664276544 has 28 divisors (see below), whose sum is σ = 1330506864. Its totient is φ = 329030784.

The previous prime is 664276541. The next prime is 664276553. The reversal of 664276544 is 445672466.

It is a super-3 number, since 3×664276544³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664276495 and 664276504.

It is not an unprimeable number, because it can be changed into a prime (664276541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41654 + ... + 55349.

Almost surely, 2^664276544 is an apocalyptic number.

664276544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

664276544 is an abundant number, since it is smaller than the sum of its proper divisors (666230320).

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

664276544 is a wasteful number, since it uses less digits than its factorization.

664276544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97122 (or 97112 counting only the distinct ones).

The product of its digits is 967680, while the sum is 44.

The square root of 664276544 is about 25773.5628891312. The cubic root of 664276544 is about 872.5352323876.

The spelling of 664276544 in words is "six hundred sixty-four million, two hundred seventy-six thousand, five hundred forty-four".