660461863 has 8 divisors (see below), whose sum is σ = 683527680. Its totient is φ = 637415520.

The previous prime is 660461839. The next prime is 660461873. The reversal of 660461863 is 368164066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660461863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660461873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112173 + ... + 117913.

It is an arithmetic number, because the mean of its divisors is an integer number (85440960).

Almost surely, 2^660461863 is an apocalyptic number.

660461863 is a deficient number, since it is larger than the sum of its proper divisors (23065817).

660461863 is a wasteful number, since it uses less digits than its factorization.

660461863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9737.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 660461863 is about 25699.4525817185. The cubic root of 660461863 is about 870.8618152316.

The spelling of 660461863 in words is "six hundred sixty million, four hundred sixty-one thousand, eight hundred sixty-three".