654430660 has 24 divisors (see below), whose sum is σ = 1480020696. Its totient is φ = 241635840.

The previous prime is 654430639. The next prime is 654430663. The reversal of 654430660 is 66034456.

It can be written as a sum of positive squares in 4 ways, for example, as 24621444 + 629809216 = 4962^2 + 25096^2 .

It is not an unprimeable number, because it can be changed into a prime (654430663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1258261 + ... + 1258780.

It is an arithmetic number, because the mean of its divisors is an integer number (61667529).

Almost surely, 2^654430660 is an apocalyptic number.

It is an amenable number.

654430660 is an abundant number, since it is smaller than the sum of its proper divisors (825590036).

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

654430660 is a wasteful number, since it uses less digits than its factorization.

654430660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517063 (or 2517061 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 654430660 is about 25581.8423886944. The cubic root of 654430660 is about 868.2028609081.

The spelling of 654430660 in words is "six hundred fifty-four million, four hundred thirty thousand, six hundred sixty".