3650661021 has 32 divisors (see below), whose sum is σ = 5660569600. Its totient is φ = 2049727680.

The previous prime is 3650660987. The next prime is 3650661023. The reversal of 3650661021 is 1201660563.

It is not a de Polignac number, because 3650661021 - 2⁶ = 3650660957 is a prime.

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 3650661021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3650661023) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 344835 + ... + 355263.

It is an arithmetic number, because the mean of its divisors is an integer number (176892800).

Almost surely, 2^3650661021 is an apocalyptic number.

It is an amenable number.

3650661021 is a deficient number, since it is larger than the sum of its proper divisors (2009908579).

3650661021 is a wasteful number, since it uses less digits than its factorization.

3650661021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10729.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 3650661021 is about 60420.7002690303. The cubic root of 3650661021 is about 1539.7746649838.

The spelling of 3650661021 in words is "three billion, six hundred fifty million, six hundred sixty-one thousand, twenty-one".