66760406766 has 32 divisors (see below), whose sum is σ = 152366098080. Its totient is φ = 21652023168.

The previous prime is 66760406759. The next prime is 66760406773.

66760406766 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (66760406759) and next prime (66760406773).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16704811 + ... + 16708806.

It is an arithmetic number, because the mean of its divisors is an integer number (4761440565).

Almost surely, 2^66760406766 is an apocalyptic number.

66760406766 is an abundant number, since it is smaller than the sum of its proper divisors (85605691314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66760406766 is a wasteful number, since it uses less digits than its factorization.

66760406766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33413665 (or 33413659 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 54.

The spelling of 66760406766 in words is "sixty-six billion, seven hundred sixty million, four hundred six thousand, seven hundred sixty-six".