665611256046 has 64 divisors (see below), whose sum is σ = 1483367510016. Its totient is φ = 197378805600.

The previous prime is 665611256027. The next prime is 665611256069. The reversal of 665611256046 is 640652116566.

It is a junction number, because it is equal to n+sod(n) for n = 665611255986 and 665611256004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28188481 + ... + 28212083.

It is an arithmetic number, because the mean of its divisors is an integer number (23177617344).

Almost surely, 2^665611256046 is an apocalyptic number.

665611256046 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

665611256046 is an abundant number, since it is smaller than the sum of its proper divisors (817756253970).

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

665611256046 is a wasteful number, since it uses less digits than its factorization.

665611256046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32757.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 665611256046 in words is "six hundred sixty-five billion, six hundred eleven million, two hundred fifty-six thousand, forty-six".