366729021 has 6 divisors (see below), whose sum is σ = 529719710. Its totient is φ = 244486008.

The previous prime is 366729007. The next prime is 366729031. The reversal of 366729021 is 120927663.

366729021 is a `hidden beast` number, since 366 + 7 + 290 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 333792900 + 32936121 = 18270^2 + 5739^2 .

It is not a de Polignac number, because 366729021 - 2⁷ = 366728893 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 (366729001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20373826 + ... + 20373843.

Almost surely, 2^366729021 is an apocalyptic number.

It is an amenable number.

366729021 is a deficient number, since it is larger than the sum of its proper divisors (162990689).

366729021 is a wasteful number, since it uses less digits than its factorization.

366729021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40747675 (or 40747672 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 366729021 is about 19150.1702603397. The cubic root of 366729021 is about 715.7836264774.

The spelling of 366729021 in words is "three hundred sixty-six million, seven hundred twenty-nine thousand, twenty-one".