660466431 has 6 divisors (see below), whose sum is σ = 954007080. Its totient is φ = 440310948.

The previous prime is 660466427. The next prime is 660466447. The reversal of 660466431 is 134664066.

660466431 is a `hidden beast` number, since 6 + 6 + 0 + 4 + 6 + 643 + 1 = 666.

It is not a de Polignac number, because 660466431 - 2² = 660466427 is a prime.

It is a super-2 number, since 2×660466431² = 872431812955755522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660466531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36692571 + ... + 36692588.

It is an arithmetic number, because the mean of its divisors is an integer number (159001180).

Almost surely, 2^660466431 is an apocalyptic number.

660466431 is a deficient number, since it is larger than the sum of its proper divisors (293540649).

660466431 is a wasteful number, since it uses less digits than its factorization.

660466431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73385165 (or 73385162 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 660466431 is about 25699.5414550532. The cubic root of 660466431 is about 870.8638229617.

The spelling of 660466431 in words is "six hundred sixty million, four hundred sixty-six thousand, four hundred thirty-one".