660213454 has 8 divisors (see below), whose sum is σ = 991655280. Its totient is φ = 329661696.

The previous prime is 660213403. The next prime is 660213473. The reversal of 660213454 is 454312066.

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

It is a super-2 number, since 2×660213454² = 871763609685220232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220659 + ... + 223630.

It is an arithmetic number, because the mean of its divisors is an integer number (123956910).

Almost surely, 2^660213454 is an apocalyptic number.

660213454 is a deficient number, since it is larger than the sum of its proper divisors (331441826).

660213454 is a wasteful number, since it uses less digits than its factorization.

660213454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445034.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 660213454 is about 25694.6191643309. The cubic root of 660213454 is about 870.7526204130.

The spelling of 660213454 in words is "six hundred sixty million, two hundred thirteen thousand, four hundred fifty-four".