665160660566 has 8 divisors (see below), whose sum is σ = 998015785824. Its totient is φ = 332488731960.

The previous prime is 665160660517. The next prime is 665160660569. The reversal of 665160660566 is 665066061566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665160660569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45790085 + ... + 45804608.

It is an arithmetic number, because the mean of its divisors is an integer number (124751973228).

Almost surely, 2^665160660566 is an apocalyptic number.

665160660566 is a deficient number, since it is larger than the sum of its proper divisors (332855125258).

665160660566 is a wasteful number, since it uses less digits than its factorization.

665160660566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91598326.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 665160660566 in words is "six hundred sixty-five billion, one hundred sixty million, six hundred sixty thousand, five hundred sixty-six".