660562117 has 4 divisors (see below), whose sum is σ = 660686220. Its totient is φ = 660438016.

The previous prime is 660562099. The next prime is 660562121. The reversal of 660562117 is 711265066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 711265066 = 2 ⋅355632533.

It can be written as a sum of positive squares in 2 ways, for example, as 158533281 + 502028836 = 12591^2 + 22406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660562117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660562817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53692 + ... + 64837.

It is an arithmetic number, because the mean of its divisors is an integer number (165171555).

Almost surely, 2^660562117 is an apocalyptic number.

It is an amenable number.

660562117 is a deficient number, since it is larger than the sum of its proper divisors (124103).

660562117 is a wasteful number, since it uses less digits than its factorization.

660562117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124102.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 660562117 is about 25701.4030161779. The cubic root of 660562117 is about 870.9058768033.

The spelling of 660562117 in words is "six hundred sixty million, five hundred sixty-two thousand, one hundred seventeen".