36661717987 has 2 divisors, whose sum is σ = 36661717988. Its totient is φ = 36661717986.

The previous prime is 36661717969. The next prime is 36661718057. The reversal of 36661717987 is 78971716663.

36661717987 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 is a cyclic number.

It is not a de Polignac number, because 36661717987 - 2²³ = 36653329379 is a prime.

It is not a weakly prime, because it can be changed into another prime (36661717087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18330858993 + 18330858994.

It is an arithmetic number, because the mean of its divisors is an integer number (18330858994).

Almost surely, 2^36661717987 is an apocalyptic number.

36661717987 is a deficient number, since it is larger than the sum of its proper divisors (1).

36661717987 is an equidigital number, since it uses as much as digits as its factorization.

36661717987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16003008, while the sum is 61.

The spelling of 36661717987 in words is "thirty-six billion, six hundred sixty-one million, seven hundred seventeen thousand, nine hundred eighty-seven".