664463661030254 has 64 divisors (see below), whose sum is σ = 1142376073272000. Its totient is φ = 288204384319488.

The previous prime is 664463661030241. The next prime is 664463661030319. The reversal of 664463661030254 is 452030166364466.

It is a self number, because there is not a number n which added to its sum of digits gives 664463661030254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169891604 + ... + 173758695.

It is an arithmetic number, because the mean of its divisors is an integer number (17849626144875).

Almost surely, 2^{664463661030254} is an apocalyptic number.

664463661030254 is a deficient number, since it is larger than the sum of its proper divisors (477912412241746).

664463661030254 is a wasteful number, since it uses less digits than its factorization.

664463661030254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343650437.

The product of its (nonzero) digits is 44789760, while the sum is 56.

The spelling of 664463661030254 in words is "six hundred sixty-four trillion, four hundred sixty-three billion, six hundred sixty-one million, thirty thousand, two hundred fifty-four".