36991664 has 20 divisors (see below), whose sum is σ = 71814600. Its totient is φ = 18458880.

The previous prime is 36991637. The next prime is 36991667. The reversal of 36991664 is 46619963.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36991667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7112 + ... + 11160.

It is an arithmetic number, because the mean of its divisors is an integer number (3590730).

Almost surely, 2^36991664 is an apocalyptic number.

It is an amenable number.

36991664 is a deficient number, since it is larger than the sum of its proper divisors (34822936).

36991664 is a wasteful number, since it uses less digits than its factorization.

36991664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4628 (or 4622 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 36991664 is about 6082.0772767205. The cubic root of 36991664 is about 333.1971585991.

The spelling of 36991664 in words is "thirty-six million, nine hundred ninety-one thousand, six hundred sixty-four".