36666870517 has 4 divisors (see below), whose sum is σ = 37519588480. Its totient is φ = 35814152556.

The previous prime is 36666870391. The next prime is 36666870523. The reversal of 36666870517 is 71507866663.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36666870517 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 (36666870547) 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, 426358917 + ... + 426359002.

It is an arithmetic number, because the mean of its divisors is an integer number (9379897120).

Almost surely, 2^36666870517 is an apocalyptic number.

It is an amenable number.

36666870517 is a deficient number, since it is larger than the sum of its proper divisors (852717963).

36666870517 is an equidigital number, since it uses as much as digits as its factorization.

36666870517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852717962.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 36666870517 in words is "thirty-six billion, six hundred sixty-six million, eight hundred seventy thousand, five hundred seventeen".