664251354 has 40 divisors (see below), whose sum is σ = 1602913620. Its totient is φ = 204384384.

The previous prime is 664251349. The next prime is 664251359. The reversal of 664251354 is 453152466.

664251354 is a `hidden beast` number, since 6 + 642 + 5 + 1 + 3 + 5 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (664251349) and next prime (664251359).

It can be written as a sum of positive squares in 2 ways, for example, as 537080625 + 127170729 = 23175^2 + 11277^2 .

It is a super-2 number, since 2×664251354² = 882459722581666632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664251359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 155599 + ... + 159810.

Almost surely, 2^664251354 is an apocalyptic number.

664251354 is an abundant number, since it is smaller than the sum of its proper divisors (938662266).

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

664251354 is a wasteful number, since it uses less digits than its factorization.

664251354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315436 (or 315427 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 664251354 is about 25773.0742054571. The cubic root of 664251354 is about 872.5242031255.

The spelling of 664251354 in words is "six hundred sixty-four million, two hundred fifty-one thousand, three hundred fifty-four".