66464075044 has 6 divisors (see below), whose sum is σ = 116312131334. Its totient is φ = 33232037520.

The previous prime is 66464074969. The next prime is 66464075057. The reversal of 66464075044 is 44057046466.

66464075044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 47554524900 + 18909550144 = 218070^2 + 137512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66464074985 and 66464075003.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308009377 + ... + 8308009384.

Almost surely, 2^66464075044 is an apocalyptic number.

It is an amenable number.

66464075044 is a deficient number, since it is larger than the sum of its proper divisors (49848056290).

66464075044 is a wasteful number, since it uses less digits than its factorization.

66464075044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16616018765 (or 16616018763 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 46.

The spelling of 66464075044 in words is "sixty-six billion, four hundred sixty-four million, seventy-five thousand, forty-four".