665430840086 has 12 divisors (see below), whose sum is σ = 1053445223052. Its totient is φ = 315204081804.

The previous prime is 665430839999. The next prime is 665430840127. The reversal of 665430840086 is 680048034566.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 460823960 + ... + 460825403.

It is an arithmetic number, because the mean of its divisors is an integer number (87787101921).

Almost surely, 2^665430840086 is an apocalyptic number.

665430840086 is a deficient number, since it is larger than the sum of its proper divisors (388014382966).

665430840086 is a wasteful number, since it uses less digits than its factorization.

665430840086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921649403 (or 921649384 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 50.

The spelling of 665430840086 in words is "six hundred sixty-five billion, four hundred thirty million, eight hundred forty thousand, eighty-six".