654664440 has 32 divisors (see below), whose sum is σ = 1963993680. Its totient is φ = 174577152.

The previous prime is 654664411. The next prime is 654664469. The reversal of 654664440 is 44466456.

It is an interprime number because it is at equal distance from previous prime (654664411) and next prime (654664469).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2727649 + ... + 2727888.

Almost surely, 2^654664440 is an apocalyptic number.

654664440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

654664440 is an abundant number, since it is smaller than the sum of its proper divisors (1309329240).

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

654664440 is a wasteful number, since it uses less digits than its factorization.

654664440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455551 (or 5455547 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 39.

The square root of 654664440 is about 25586.4112372173. The cubic root of 654664440 is about 868.3062303015.

The spelling of 654664440 in words is "six hundred fifty-four million, six hundred sixty-four thousand, four hundred forty".