524640664 has 8 divisors (see below), whose sum is σ = 983701260. Its totient is φ = 262320328.

The previous prime is 524640643. The next prime is 524640667. The reversal of 524640664 is 466046425.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (524640667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32790034 + ... + 32790049.

Almost surely, 2^524640664 is an apocalyptic number.

It is an amenable number.

524640664 is a deficient number, since it is larger than the sum of its proper divisors (459060596).

524640664 is a wasteful number, since it uses less digits than its factorization.

524640664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65580089 (or 65580085 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 524640664 is about 22905.0357781864. The cubic root of 524640664 is about 806.5302292602.

The spelling of 524640664 in words is "five hundred twenty-four million, six hundred forty thousand, six hundred sixty-four".