666246524 has 48 divisors (see below), whose sum is σ = 1256018400. Its totient is φ = 308115456.

The previous prime is 666246509. The next prime is 666246527. The reversal of 666246524 is 425642666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666246527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1712522 + ... + 1712910.

It is an arithmetic number, because the mean of its divisors is an integer number (26167050).

Almost surely, 2^666246524 is an apocalyptic number.

It is an amenable number.

666246524 is a deficient number, since it is larger than the sum of its proper divisors (589771876).

666246524 is a wasteful number, since it uses less digits than its factorization.

666246524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 780 counting only the distinct ones).

The product of its digits is 414720, while the sum is 41.

The square root of 666246524 is about 25811.7516646972. The cubic root of 666246524 is about 873.3969119587.

The spelling of 666246524 in words is "six hundred sixty-six million, two hundred forty-six thousand, five hundred twenty-four".