8464076721 has 16 divisors (see below), whose sum is σ = 12558427200. Its totient is φ = 5634143424.

The previous prime is 8464076707. The next prime is 8464076743. The reversal of 8464076721 is 1276704648.

It is not a de Polignac number, because 8464076721 - 2⁶ = 8464076657 is a prime.

It is a super-2 number, since 2×8464076721² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8464076771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220056 + ... + 255641.

It is an arithmetic number, because the mean of its divisors is an integer number (784901700).

Almost surely, 2^8464076721 is an apocalyptic number.

It is an amenable number.

8464076721 is a deficient number, since it is larger than the sum of its proper divisors (4094350479).

8464076721 is a wasteful number, since it uses less digits than its factorization.

8464076721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476365 (or 476359 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 8464076721 is about 92000.4169610116. The cubic root of 8464076721 is about 2037.9484630715.

The spelling of 8464076721 in words is "eight billion, four hundred sixty-four million, seventy-six thousand, seven hundred twenty-one".