664787081002 has 32 divisors (see below), whose sum is σ = 1101646656000. Its totient is φ = 298362121200.

The previous prime is 664787080901. The next prime is 664787081017. The reversal of 664787081002 is 200180787466.

It is a happy number.

664787081002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 6052 + ... + 1153087.

It is an arithmetic number, because the mean of its divisors is an integer number (34426458000).

Almost surely, 2^664787081002 is an apocalyptic number.

664787081002 is a deficient number, since it is larger than the sum of its proper divisors (436859574998).

664787081002 is a wasteful number, since it uses less digits than its factorization.

664787081002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159482.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 664787081002 in words is "six hundred sixty-four billion, seven hundred eighty-seven million, eighty-one thousand, two".