666466624 has 14 divisors (see below), whose sum is σ = 1322519834. Its totient is φ = 333233280.

The previous prime is 666466601. The next prime is 666466649. The reversal of 666466624 is 426664666.

666466624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 482593024 + 183873600 = 21968^2 + 13560^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5206707 + ... + 5206834.

Almost surely, 2^666466624 is an apocalyptic number.

666466624 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

666466624 is a deficient number, since it is larger than the sum of its proper divisors (656053210).

666466624 is a wasteful number, since it uses less digits than its factorization.

666466624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10413553 (or 10413543 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 46.

The square root of 666466624 is about 25816.0148744922. The cubic root of 666466624 is about 873.4930793125.

The spelling of 666466624 in words is "six hundred sixty-six million, four hundred sixty-six thousand, six hundred twenty-four".