664787068012 has 24 divisors (see below), whose sum is σ = 1191933353520. Its totient is φ = 324237143040.

The previous prime is 664787067991. The next prime is 664787068021. The reversal of 664787068012 is 210860787466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787708 + ... + 1396444.

It is an arithmetic number, because the mean of its divisors is an integer number (49663889730).

Almost surely, 2^664787068012 is an apocalyptic number.

It is an amenable number.

664787068012 is a deficient number, since it is larger than the sum of its proper divisors (527146285508).

664787068012 is a wasteful number, since it uses less digits than its factorization.

664787068012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615441 (or 615439 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 664787068012 in words is "six hundred sixty-four billion, seven hundred eighty-seven million, sixty-eight thousand, twelve".