4406737866921 has 24 divisors (see below), whose sum is σ = 6855276232896. Its totient is φ = 2711699964000.

The previous prime is 4406737866899. The next prime is 4406737867067. The reversal of 4406737866921 is 1296687376044.

It is a happy number.

4406737866921 is a `hidden beast` number, since 4 + 406 + 73 + 7 + 86 + 69 + 21 = 666.

It is not a de Polignac number, because 4406737866921 - 2¹⁵ = 4406737834153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4406737666921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1357386 + ... + 3264348.

It is an arithmetic number, because the mean of its divisors is an integer number (285636509704).

Almost surely, 2^{4406737866921} is an apocalyptic number.

It is an amenable number.

4406737866921 is a deficient number, since it is larger than the sum of its proper divisors (2448538365975).

4406737866921 is a wasteful number, since it uses less digits than its factorization.

4406737866921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926733 (or 1926730 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 4406737866921 in words is "four trillion, four hundred six billion, seven hundred thirty-seven million, eight hundred sixty-six thousand, nine hundred twenty-one".