665364463566 has 32 divisors (see below), whose sum is σ = 1466077608576. Its totient is φ = 199629300000.

The previous prime is 665364463553. The next prime is 665364463579.

665364463566 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (665364463553) and next prime (665364463579).

It is a Curzon number.

It is a congruent number.

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, 49900660 + ... + 49913991.

It is an arithmetic number, because the mean of its divisors is an integer number (45814925268).

Almost surely, 2^665364463566 is an apocalyptic number.

665364463566 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

665364463566 is an abundant number, since it is smaller than the sum of its proper divisors (800713145010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665364463566 is a wasteful number, since it uses less digits than its factorization.

665364463566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99814768.

The product of its digits is 167961600, while the sum is 60.

The spelling of 665364463566 in words is "six hundred sixty-five billion, three hundred sixty-four million, four hundred sixty-three thousand, five hundred sixty-six".