39977166877 has 4 divisors (see below), whose sum is σ = 40389302716. Its totient is φ = 39565031040.

The previous prime is 39977166871. The next prime is 39977166881. The reversal of 39977166877 is 77866177993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25234593316 + 14742573561 = 158854^2 + 121419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39977166877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39977166871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206067774 + ... + 206067967.

It is an arithmetic number, because the mean of its divisors is an integer number (10097325679).

Almost surely, 2^39977166877 is an apocalyptic number.

It is an amenable number.

39977166877 is a deficient number, since it is larger than the sum of its proper divisors (412135839).

39977166877 is an equidigital number, since it uses as much as digits as its factorization.

39977166877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412135838.

The product of its digits is 168031584, while the sum is 70.

The spelling of 39977166877 in words is "thirty-nine billion, nine hundred seventy-seven million, one hundred sixty-six thousand, eight hundred seventy-seven".