39977166869 has 4 divisors (see below), whose sum is σ = 40013743596. Its totient is φ = 39940590144.

The previous prime is 39977166829. The next prime is 39977166871. The reversal of 39977166869 is 96866177993.

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 26085480100 + 13891686769 = 161510^2 + 117863^2 .

It is a cyclic number.

It is not a de Polignac number, because 39977166869 - 2¹² = 39977162773 is a prime.

It is a super-2 number, since 2×39977166869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39977166829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18286724 + ... + 18288909.

It is an arithmetic number, because the mean of its divisors is an integer number (10003435899).

Almost surely, 2^39977166869 is an apocalyptic number.

It is an amenable number.

39977166869 is a deficient number, since it is larger than the sum of its proper divisors (36576727).

39977166869 is a wasteful number, since it uses less digits than its factorization.

39977166869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36576726.

The product of its digits is 185177664, while the sum is 71.

The spelling of 39977166869 in words is "thirty-nine billion, nine hundred seventy-seven million, one hundred sixty-six thousand, eight hundred sixty-nine".