66804364377 has 12 divisors (see below), whose sum is σ = 96870664020. Its totient is φ = 44362948608.

The previous prime is 66804364373. The next prime is 66804364387. The reversal of 66804364377 is 77346340866.

It is a happy number.

66804364377 is a `hidden beast` number, since 66 + 80 + 436 + 4 + 3 + 77 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64585106496 + 2219257881 = 254136^2 + 47109^2 .

It is not a de Polignac number, because 66804364377 - 2² = 66804364373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66804364373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14438752 + ... + 14443377.

It is an arithmetic number, because the mean of its divisors is an integer number (8072555335).

Almost surely, 2^66804364377 is an apocalyptic number.

It is an amenable number.

66804364377 is a deficient number, since it is larger than the sum of its proper divisors (30066299643).

66804364377 is a wasteful number, since it uses less digits than its factorization.

66804364377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28882392 (or 28882389 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 54.

The spelling of 66804364377 in words is "sixty-six billion, eight hundred four million, three hundred sixty-four thousand, three hundred seventy-seven".