665142560456366 has 16 divisors (see below), whose sum is σ = 1050534987987600. Its totient is φ = 314974560878208.

The previous prime is 665142560456329. The next prime is 665142560456371. The reversal of 665142560456366 is 663654065241566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2582307275 + ... + 2582564838.

It is an arithmetic number, because the mean of its divisors is an integer number (65658436749225).

Almost surely, 2^{665142560456366} is an apocalyptic number.

665142560456366 is a deficient number, since it is larger than the sum of its proper divisors (385392427531234).

665142560456366 is a wasteful number, since it uses less digits than its factorization.

665142560456366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164875523.

The product of its (nonzero) digits is 559872000, while the sum is 65.

The spelling of 665142560456366 in words is "six hundred sixty-five trillion, one hundred forty-two billion, five hundred sixty million, four hundred fifty-six thousand, three hundred sixty-six".