720564867 has 24 divisors (see below), whose sum is σ = 1136369520. Its totient is φ = 436346880.

The previous prime is 720564851. The next prime is 720564877. The reversal of 720564867 is 768465027.

720564867 is a `hidden beast` number, since 7 + 2 + 0 + 564 + 86 + 7 = 666.

It is not a de Polignac number, because 720564867 - 2⁴ = 720564851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720564847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165859 + ... + 170147.

It is an arithmetic number, because the mean of its divisors is an integer number (47348730).

Almost surely, 2^720564867 is an apocalyptic number.

720564867 is a deficient number, since it is larger than the sum of its proper divisors (415804653).

720564867 is a wasteful number, since it uses less digits than its factorization.

720564867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6003 (or 6000 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 720564867 is about 26843.3393414456. The cubic root of 720564867 is about 896.5152767143.

The spelling of 720564867 in words is "seven hundred twenty million, five hundred sixty-four thousand, eight hundred sixty-seven".