6665533 has 4 divisors (see below), whose sum is σ = 7617760. Its totient is φ = 5713308.

The previous prime is 6665497. The next prime is 6665537. The reversal of 6665533 is 3355666.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6665533 - 2²¹ = 4568381 is a prime.

It is a Duffinian number.

6665533 is a lucky number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476103 + ... + 476116.

It is an arithmetic number, because the mean of its divisors is an integer number (1904440).

Almost surely, 2^6665533 is an apocalyptic number.

It is an amenable number.

6665533 is a deficient number, since it is larger than the sum of its proper divisors (952227).

6665533 is an equidigital number, since it uses as much as digits as its factorization.

6665533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952226.

The product of its digits is 48600, while the sum is 34.

The square root of 6665533 is about 2581.7693545319. The cubic root of 6665533 is about 188.1965369597.

It can be divided in two parts, 6665 and 533, that multiplied together give a triangular number (3552445 = T₂₆₆₅).

The spelling of 6665533 in words is "six million, six hundred sixty-five thousand, five hundred thirty-three".