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666203441 = 19231524493
BaseRepresentation
bin100111101101010…
…111010100110001
31201102120122022112
4213231113110301
52331022002231
6150035015105
722336431041
oct4755272461
91642518275
10666203441
11312066562
1216713a495
13a8038327
146469b721
153d74892b
hex27b57531

666203441 has 8 divisors (see below), whose sum is σ = 731757120. Its totient is φ = 603698832.

The previous prime is 666203413. The next prime is 666203449. The reversal of 666203441 is 144302666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666203441 - 210 = 666202417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666203398 and 666203407.

It is not an unprimeable number, because it can be changed into a prime (666203449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761810 + ... + 762683.

It is an arithmetic number, because the mean of its divisors is an integer number (91469640).

Almost surely, 2666203441 is an apocalyptic number.

It is an amenable number.

666203441 is a deficient number, since it is larger than the sum of its proper divisors (65553679).

666203441 is a wasteful number, since it uses less digits than its factorization.

666203441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524535.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 666203441 is about 25810.9170894798. The cubic root of 666203441 is about 873.3780854088.

The spelling of 666203441 in words is "six hundred sixty-six million, two hundred three thousand, four hundred forty-one".

Divisors: 1 19 23 437 1524493 28965367 35063339 666203441