665147363686 has 16 divisors (see below), whose sum is σ = 1075354663824. Its totient is φ = 306737992224.

The previous prime is 665147363579. The next prime is 665147363689. The reversal of 665147363686 is 686363741566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665147363689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10513636 + ... + 10576711.

It is an arithmetic number, because the mean of its divisors is an integer number (67209666489).

Almost surely, 2^665147363686 is an apocalyptic number.

665147363686 is a deficient number, since it is larger than the sum of its proper divisors (410207300138).

665147363686 is a wasteful number, since it uses less digits than its factorization.

665147363686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21091575.

The product of its digits is 78382080, while the sum is 61.

The spelling of 665147363686 in words is "six hundred sixty-five billion, one hundred forty-seven million, three hundred sixty-three thousand, six hundred eighty-six".