664541424 has 60 divisors (see below), whose sum is σ = 1969199856. Its totient is φ = 208482816.

The previous prime is 664541419. The next prime is 664541431. The reversal of 664541424 is 424145466.

664541424 is a `hidden beast` number, since 6 + 645 + 4 + 1 + 4 + 2 + 4 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133284 + ... + 138179.

Almost surely, 2^664541424 is an apocalyptic number.

It is an amenable number.

664541424 is an abundant number, since it is smaller than the sum of its proper divisors (1304658432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664541424 is a wasteful number, since it uses less digits than its factorization.

664541424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271494 (or 271485 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 664541424 is about 25778.7009758056. The cubic root of 664541424 is about 872.6511913317.

The spelling of 664541424 in words is "six hundred sixty-four million, five hundred forty-one thousand, four hundred twenty-four".