654666920 has 32 divisors (see below), whose sum is σ = 1493185320. Its totient is φ = 258278400.

The previous prime is 654666913. The next prime is 654666941. The reversal of 654666920 is 29666456.

It can be written as a sum of positive squares in 4 ways, for example, as 331458436 + 323208484 = 18206^2 + 17978^2 .

It is a super-2 number, since 2×654666920² = 857177552284572800, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 109181 + ... + 115020.

Almost surely, 2^654666920 is an apocalyptic number.

It is an amenable number.

654666920 is an abundant number, since it is smaller than the sum of its proper divisors (838518400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

654666920 is a wasteful number, since it uses less digits than its factorization.

654666920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224285 (or 224281 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 654666920 is about 25586.4597003962. The cubic root of 654666920 is about 868.3073267394.

The spelling of 654666920 in words is "six hundred fifty-four million, six hundred sixty-six thousand, nine hundred twenty".