66736736733988 has 12 divisors (see below), whose sum is σ = 117277947400320. Its totient is φ = 33228751762472.

The previous prime is 66736736733871. The next prime is 66736736734001. The reversal of 66736736733988 is 88933763763766.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34904150056 + ... + 34904151967.

It is an arithmetic number, because the mean of its divisors is an integer number (9773162283360).

Almost surely, 2^{66736736733988} is an apocalyptic number.

It is an amenable number.

66736736733988 is a deficient number, since it is larger than the sum of its proper divisors (50541210666332).

66736736733988 is a wasteful number, since it uses less digits than its factorization.

66736736733988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69808302266 (or 69808302264 counting only the distinct ones).

The product of its digits is 20739898368, while the sum is 82.

The spelling of 66736736733988 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred thirty-six million, seven hundred thirty-three thousand, nine hundred eighty-eight".