36666581920 has 48 divisors (see below), whose sum is σ = 91720383048. Its totient is φ = 13803888640.

The previous prime is 36666581893. The next prime is 36666581933. The reversal of 36666581920 is 2918566663.

It can be written as a sum of positive squares in 4 ways, for example, as 27906370704 + 8760211216 = 167052^2 + 93596^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6737461 + ... + 6742900.

Almost surely, 2^36666581920 is an apocalyptic number.

It is an amenable number.

36666581920 is an abundant number, since it is smaller than the sum of its proper divisors (55053801128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

36666581920 is a wasteful number, since it uses less digits than its factorization.

36666581920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13480393 (or 13480385 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 36666581920 in words is "thirty-six billion, six hundred sixty-six million, five hundred eighty-one thousand, nine hundred twenty".