36668721 has 8 divisors (see below), whose sum is σ = 49366720. Its totient is φ = 24208272.

The previous prime is 36668713. The next prime is 36668729. The reversal of 36668721 is 12786663.

It is an interprime number because it is at equal distance from previous prime (36668713) and next prime (36668729).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 36668721 - 2³ = 36668713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 36668721.

It is not an unprimeable number, because it can be changed into a prime (36668729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59026 + ... + 59643.

It is an arithmetic number, because the mean of its divisors is an integer number (6170840).

Almost surely, 2^36668721 is an apocalyptic number.

It is an amenable number.

36668721 is a deficient number, since it is larger than the sum of its proper divisors (12697999).

36668721 is a wasteful number, since it uses less digits than its factorization.

36668721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118775.

The product of its digits is 72576, while the sum is 39.

The square root of 36668721 is about 6055.4703368112. The cubic root of 36668721 is about 332.2247021205.

The spelling of 36668721 in words is "thirty-six million, six hundred sixty-eight thousand, seven hundred twenty-one".