660294617 has 8 divisors (see below), whose sum is σ = 679693896. Its totient is φ = 641152512.

The previous prime is 660294611. The next prime is 660294623. The reversal of 660294617 is 716492066.

It is an interprime number because it is at equal distance from previous prime (660294611) and next prime (660294623).

It can be written as a sum of positive squares in 4 ways, for example, as 19749136 + 640545481 = 4444^2 + 25309^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 660294617 - 2⁸ = 660294361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660294611) 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, 59078 + ... + 69359.

It is an arithmetic number, because the mean of its divisors is an integer number (84961737).

Almost surely, 2^660294617 is an apocalyptic number.

It is an amenable number.

660294617 is a deficient number, since it is larger than the sum of its proper divisors (19399279).

660294617 is a wasteful number, since it uses less digits than its factorization.

660294617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128587.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 660294617 is about 25696.1984931624. The cubic root of 660294617 is about 870.7883007922.

The spelling of 660294617 in words is "six hundred sixty million, two hundred ninety-four thousand, six hundred seventeen".