66707066626 has 4 divisors (see below), whose sum is σ = 100060599942. Its totient is φ = 33353533312.

The previous prime is 66707066623. The next prime is 66707066639. The reversal of 66707066626 is 62666070766.

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., 66590318601 + 116748025 = 258051^2 + 10805^2 .

It is not an unprimeable number, because it can be changed into a prime (66707066623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16676766655 + ... + 16676766658.

Almost surely, 2^66707066626 is an apocalyptic number.

66707066626 is a deficient number, since it is larger than the sum of its proper divisors (33353533316).

66707066626 is a wasteful number, since it uses less digits than its factorization.

66707066626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33353533315.

The product of its (nonzero) digits is 4572288, while the sum is 52.

The spelling of 66707066626 in words is "sixty-six billion, seven hundred seven million, sixty-six thousand, six hundred twenty-six".