664541234720574 has 32 divisors (see below), whose sum is σ = 1335094029029376. Its totient is φ = 220512502462080.

The previous prime is 664541234720543. The next prime is 664541234720647. The reversal of 664541234720574 is 475027432145466.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81632292 + ... + 89403095.

It is an arithmetic number, because the mean of its divisors is an integer number (41721688407168).

Almost surely, 2^{664541234720574} is an apocalyptic number.

664541234720574 is an abundant number, since it is smaller than the sum of its proper divisors (670552794308802).

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

664541234720574 is a wasteful number, since it uses less digits than its factorization.

664541234720574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171038320.

The product of its (nonzero) digits is 135475200, while the sum is 60.

The spelling of 664541234720574 in words is "six hundred sixty-four trillion, five hundred forty-one billion, two hundred thirty-four million, seven hundred twenty thousand, five hundred seventy-four".