660309795 has 12 divisors (see below), whose sum is σ = 1144537056. Its totient is φ = 352165200.

The previous prime is 660309791. The next prime is 660309799. The reversal of 660309795 is 597903066.

It is an interprime number because it is at equal distance from previous prime (660309791) and next prime (660309799).

It is not a de Polignac number, because 660309795 - 2² = 660309791 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 14673551 = 660309795 / (6 + 6 + 0 + 3 + 0 + 9 + 7 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 660309795.

It is not an unprimeable number, because it can be changed into a prime (660309791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7336731 + ... + 7336820.

It is an arithmetic number, because the mean of its divisors is an integer number (95378088).

Almost surely, 2^660309795 is an apocalyptic number.

660309795 is a deficient number, since it is larger than the sum of its proper divisors (484227261).

660309795 is a wasteful number, since it uses less digits than its factorization.

660309795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14673562 (or 14673559 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 660309795 is about 25696.4938269796. The cubic root of 660309795 is about 870.7949729267.

The spelling of 660309795 in words is "six hundred sixty million, three hundred nine thousand, seven hundred ninety-five".