655660561966 has 8 divisors (see below), whose sum is σ = 990669608640. Its totient is φ = 325437359088.

The previous prime is 655660561939. The next prime is 655660561993. The reversal of 655660561966 is 669165066556.

It is an interprime number because it is at equal distance from previous prime (655660561939) and next prime (655660561993).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1196460606 + ... + 1196461153.

It is an arithmetic number, because the mean of its divisors is an integer number (123833701080).

Almost surely, 2^655660561966 is an apocalyptic number.

655660561966 is a deficient number, since it is larger than the sum of its proper divisors (335009046674).

655660561966 is a wasteful number, since it uses less digits than its factorization.

655660561966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392921898.

The product of its (nonzero) digits is 52488000, while the sum is 61.

The spelling of 655660561966 in words is "six hundred fifty-five billion, six hundred sixty million, five hundred sixty-one thousand, nine hundred sixty-six".