66944725004 has 24 divisors (see below), whose sum is σ = 122358904080. Its totient is φ = 32015704896.

The previous prime is 66944724961. The next prime is 66944725009. The reversal of 66944725004 is 40052744966.

66944725004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66944725004² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66944725004.

It is not an unprimeable number, because it can be changed into a prime (66944725009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3824567 + ... + 3842030.

It is an arithmetic number, because the mean of its divisors is an integer number (5098287670).

Almost surely, 2^66944725004 is an apocalyptic number.

It is an amenable number.

66944725004 is a deficient number, since it is larger than the sum of its proper divisors (55414179076).

66944725004 is a wasteful number, since it uses less digits than its factorization.

66944725004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666697 (or 7666695 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 66944725004 in words is "sixty-six billion, nine hundred forty-four million, seven hundred twenty-five thousand, four".