660205902281 has 8 divisors (see below), whose sum is σ = 688930761024. Its totient is φ = 631482731440.

The previous prime is 660205902271. The next prime is 660205902331. The reversal of 660205902281 is 182209502066.

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 660205902281 - 2²⁶ = 660138793417 is a prime.

It is a super-2 number, since 2×660205902281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660205902241) 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, 412451 + ... + 1220871.

It is an arithmetic number, because the mean of its divisors is an integer number (86116345128).

Almost surely, 2^660205902281 is an apocalyptic number.

It is an amenable number.

660205902281 is a deficient number, since it is larger than the sum of its proper divisors (28724858743).

660205902281 is a wasteful number, since it uses less digits than its factorization.

660205902281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843951.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 660205902281 in words is "six hundred sixty billion, two hundred five million, nine hundred two thousand, two hundred eighty-one".