66767777734037 has 8 divisors (see below), whose sum is σ = 68396831901720. Its totient is φ = 65138750794240.

The previous prime is 66767777734003. The next prime is 66767777734043. The reversal of 66767777734037 is 73043777776766.

It can be written as a sum of positive squares in 4 ways, for example, as 3092360881 + 66764685373156 = 55609^2 + 8170966^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66767777734037 - 2⁸ = 66767777733781 is a prime.

It is a super-2 number, since 2×66767777734037² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66767777704037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1798358 + ... + 11694855.

It is an arithmetic number, because the mean of its divisors is an integer number (8549603987715).

Almost surely, 2^{66767777734037} is an apocalyptic number.

It is an amenable number.

66767777734037 is a deficient number, since it is larger than the sum of its proper divisors (1629054167683).

66767777734037 is a wasteful number, since it uses less digits than its factorization.

66767777734037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13613943.

The product of its (nonzero) digits is 6403870368, while the sum is 77.

The spelling of 66767777734037 in words is "sixty-six trillion, seven hundred sixty-seven billion, seven hundred seventy-seven million, seven hundred thirty-four thousand, thirty-seven".