660912197 has 8 divisors (see below), whose sum is σ = 724014720. Its totient is φ = 598312960.

The previous prime is 660912137. The next prime is 660912211. The reversal of 660912197 is 791219066.

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-660912197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660912137) 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, 123068 + ... + 128325.

It is an arithmetic number, because the mean of its divisors is an integer number (90501840).

Almost surely, 2^660912197 is an apocalyptic number.

It is an amenable number.

660912197 is a deficient number, since it is larger than the sum of its proper divisors (63102523).

660912197 is a wasteful number, since it uses less digits than its factorization.

660912197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251643.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 660912197 is about 25708.2126372099. The cubic root of 660912197 is about 871.0597017941.

The spelling of 660912197 in words is "six hundred sixty million, nine hundred twelve thousand, one hundred ninety-seven".