660382665 has 16 divisors (see below), whose sum is σ = 1079094528. Its totient is φ = 344710016.

The previous prime is 660382661. The next prime is 660382669. The reversal of 660382665 is 566283066.

It is an interprime number because it is at equal distance from previous prime (660382661) and next prime (660382669).

It is a cyclic number.

It is not a de Polignac number, because 660382665 - 2² = 660382661 is a prime.

It is a super-2 number, since 2×660382665² = 872210528465004450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (660382661) 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, 467652 + ... + 469061.

It is an arithmetic number, because the mean of its divisors is an integer number (67443408).

Almost surely, 2^660382665 is an apocalyptic number.

It is an amenable number.

660382665 is a deficient number, since it is larger than the sum of its proper divisors (418711863).

660382665 is a wasteful number, since it uses less digits than its factorization.

660382665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936768.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 660382665 is about 25697.9116855825. The cubic root of 660382665 is about 870.8270046064.

The spelling of 660382665 in words is "six hundred sixty million, three hundred eighty-two thousand, six hundred sixty-five".