664577026630642 has 8 divisors (see below), whose sum is σ = 1049332147311600. Its totient is φ = 314799644193444.

The previous prime is 664577026630633. The next prime is 664577026630663. The reversal of 664577026630642 is 246036620775466.

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

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, 8744434560892 + ... + 8744434560967.

It is an arithmetic number, because the mean of its divisors is an integer number (131166518413950).

Almost surely, 2^{664577026630642} is an apocalyptic number.

664577026630642 is a deficient number, since it is larger than the sum of its proper divisors (384755120680958).

664577026630642 is a wasteful number, since it uses less digits than its factorization.

664577026630642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17488869121880.

The product of its (nonzero) digits is 365783040, while the sum is 64.

The spelling of 664577026630642 in words is "six hundred sixty-four trillion, five hundred seventy-seven billion, twenty-six million, six hundred thirty thousand, six hundred forty-two".