664862404506 has 8 divisors (see below), whose sum is σ = 1329724809024. Its totient is φ = 221620801500.

The previous prime is 664862404439. The next prime is 664862404559. The reversal of 664862404506 is 605404268466.

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

664862404506 is an admirable number.

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, 55405200370 + ... + 55405200381.

It is an arithmetic number, because the mean of its divisors is an integer number (166215601128).

Almost surely, 2^664862404506 is an apocalyptic number.

664862404506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

664862404506 is a wasteful number, since it uses less digits than its factorization.

664862404506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110810400756.

The product of its (nonzero) digits is 6635520, while the sum is 51.

The spelling of 664862404506 in words is "six hundred sixty-four billion, eight hundred sixty-two million, four hundred four thousand, five hundred six".