66951406549604 has 12 divisors (see below), whose sum is σ = 122259090221184. Its totient is φ = 32020237914984.

The previous prime is 66951406549603. The next prime is 66951406549609. The reversal of 66951406549604 is 40694560415966.

It is not an unprimeable number, because it can be changed into a prime (66951406549603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363866339852 + ... + 363866340035.

It is an arithmetic number, because the mean of its divisors is an integer number (10188257518432).

Almost surely, 2^{66951406549604} is an apocalyptic number.

It is an amenable number.

66951406549604 is a deficient number, since it is larger than the sum of its proper divisors (55307683671580).

66951406549604 is a wasteful number, since it uses less digits than its factorization.

66951406549604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727732679914 (or 727732679912 counting only the distinct ones).

The product of its (nonzero) digits is 167961600, while the sum is 65.

The spelling of 66951406549604 in words is "sixty-six trillion, nine hundred fifty-one billion, four hundred six million, five hundred forty-nine thousand, six hundred four".