660944259297 has 96 divisors (see below), whose sum is σ = 1216890355200. Its totient is φ = 352463148576.

The previous prime is 660944259293. The next prime is 660944259337. The reversal of 660944259297 is 792952449066.

660944259297 is a `hidden beast` number, since 6 + 6 + 0 + 94 + 4 + 259 + 297 = 666.

It is not a de Polignac number, because 660944259297 - 2² = 660944259293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (660944259293) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1487958 + ... + 1880400.

It is an arithmetic number, because the mean of its divisors is an integer number (12675941200).

Almost surely, 2^660944259297 is an apocalyptic number.

660944259297 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

660944259297 is a deficient number, since it is larger than the sum of its proper divisors (555946095903).

660944259297 is a wasteful number, since it uses less digits than its factorization.

660944259297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392552 (or 392539 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 63.

The spelling of 660944259297 in words is "six hundred sixty billion, nine hundred forty-four million, two hundred fifty-nine thousand, two hundred ninety-seven".