77066613377 has 8 divisors (see below), whose sum is σ = 85019078760. Its totient is φ = 69403328640.

The previous prime is 77066613359. The next prime is 77066613401. The reversal of 77066613377 is 77331666077.

It can be written as a sum of positive squares in 4 ways, for example, as 76457536 + 76990155841 = 8744^2 + 277471^2 .

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 77066613377 - 2⁸ = 77066613121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77066613307) 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, 72294602 + ... + 72295667.

It is an arithmetic number, because the mean of its divisors is an integer number (10627384845).

Almost surely, 2^77066613377 is an apocalyptic number.

It is an amenable number.

77066613377 is a deficient number, since it is larger than the sum of its proper divisors (7952465383).

77066613377 is a wasteful number, since it uses less digits than its factorization.

77066613377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144590323.

The product of its (nonzero) digits is 4667544, while the sum is 53.

The spelling of 77066613377 in words is "seventy-seven billion, sixty-six million, six hundred thirteen thousand, three hundred seventy-seven".