665566056242 has 32 divisors (see below), whose sum is σ = 1036011293184. Its totient is φ = 320346576000.

The previous prime is 665566056217. The next prime is 665566056299. The reversal of 665566056242 is 242650665566.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10289333 + ... + 10353815.

It is an arithmetic number, because the mean of its divisors is an integer number (32375352912).

Almost surely, 2^665566056242 is an apocalyptic number.

665566056242 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

665566056242 is a deficient number, since it is larger than the sum of its proper divisors (370445236942).

665566056242 is a wasteful number, since it uses less digits than its factorization.

665566056242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65394.

The product of its (nonzero) digits is 15552000, while the sum is 53.

The spelling of 665566056242 in words is "six hundred sixty-five billion, five hundred sixty-six million, fifty-six thousand, two hundred forty-two".