66737406706 has 4 divisors (see below), whose sum is σ = 100106110062. Its totient is φ = 33368703352.

The previous prime is 66737406683. The next prime is 66737406713. The reversal of 66737406706 is 60760473766.

66737406706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64673067481 + 2064339225 = 254309^2 + 45435^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16684351675 + ... + 16684351678.

Almost surely, 2^66737406706 is an apocalyptic number.

66737406706 is a deficient number, since it is larger than the sum of its proper divisors (33368703356).

66737406706 is a wasteful number, since it uses less digits than its factorization.

66737406706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33368703355.

The product of its (nonzero) digits is 5334336, while the sum is 52.

The spelling of 66737406706 in words is "sixty-six billion, seven hundred thirty-seven million, four hundred six thousand, seven hundred six".