667117514977 has 2 divisors, whose sum is σ = 667117514978. Its totient is φ = 667117514976.

The previous prime is 667117514969. The next prime is 667117515041. The reversal of 667117514977 is 779415711766.

667117514977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 664370077921 + 2747437056 = 815089^2 + 52416^2 .

It is a cyclic number.

It is not a de Polignac number, because 667117514977 - 2³ = 667117514969 is a prime.

It is not a weakly prime, because it can be changed into another prime (667117514477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333558757488 + 333558757489.

It is an arithmetic number, because the mean of its divisors is an integer number (333558757489).

Almost surely, 2^667117514977 is an apocalyptic number.

It is an amenable number.

667117514977 is a deficient number, since it is larger than the sum of its proper divisors (1).

667117514977 is an equidigital number, since it uses as much as digits as its factorization.

667117514977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15558480, while the sum is 61.

The spelling of 667117514977 in words is "six hundred sixty-seven billion, one hundred seventeen million, five hundred fourteen thousand, nine hundred seventy-seven".