66767037077 has 16 divisors (see below), whose sum is σ = 75867227520. Its totient is φ = 58248590400.

The previous prime is 66767037061. The next prime is 66767037097. The reversal of 66767037077 is 77073076766.

It is a happy number.

It is not a de Polignac number, because 66767037077 - 2⁴ = 66767037061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66767037017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217049 + ... + 425022.

It is an arithmetic number, because the mean of its divisors is an integer number (4741701720).

Almost surely, 2^66767037077 is an apocalyptic number.

It is an amenable number.

66767037077 is a deficient number, since it is larger than the sum of its proper divisors (9100190443).

66767037077 is a wasteful number, since it uses less digits than its factorization.

66767037077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642524.

The product of its (nonzero) digits is 10890936, while the sum is 56.

The spelling of 66767037077 in words is "sixty-six billion, seven hundred sixty-seven million, thirty-seven thousand, seventy-seven".