661165362454114 has 64 divisors (see below), whose sum is σ = 1194562212768000. Its totient is φ = 268461458092800.

The previous prime is 661165362454021. The next prime is 661165362454133. The reversal of 661165362454114 is 411454263561166.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21279564 + ... + 42132535.

It is an arithmetic number, because the mean of its divisors is an integer number (18665034574500).

Almost surely, 2^{661165362454114} is an apocalyptic number.

661165362454114 is a deficient number, since it is larger than the sum of its proper divisors (533396850313886).

661165362454114 is a wasteful number, since it uses less digits than its factorization.

661165362454114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63412619.

The product of its digits is 12441600, while the sum is 55.

The spelling of 661165362454114 in words is "six hundred sixty-one trillion, one hundred sixty-five billion, three hundred sixty-two million, four hundred fifty-four thousand, one hundred fourteen".