66762193709377 has 16 divisors (see below), whose sum is σ = 68561903913552. Its totient is φ = 64985345925120.

The previous prime is 66762193709363. The next prime is 66762193709399. The reversal of 66762193709377 is 77390739126766.

It can be written as a sum of positive squares in 8 ways, for example, as 61635013696 + 66700558695681 = 248264^2 + 8167041^2 .

It is a cyclic number.

It is not a de Polignac number, because 66762193709377 - 2⁷ = 66762193709249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66762193709357) 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, 71707113 + ... + 72632185.

It is an arithmetic number, because the mean of its divisors is an integer number (4285118994597).

Almost surely, 2^{66762193709377} is an apocalyptic number.

It is an amenable number.

66762193709377 is a deficient number, since it is larger than the sum of its proper divisors (1799710204175).

66762193709377 is a wasteful number, since it uses less digits than its factorization.

66762193709377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937428.

The product of its (nonzero) digits is 756142128, while the sum is 73.

The spelling of 66762193709377 in words is "sixty-six trillion, seven hundred sixty-two billion, one hundred ninety-three million, seven hundred nine thousand, three hundred seventy-seven".