661151151166 has 32 divisors (see below), whose sum is σ = 1104234962400. Its totient is φ = 294334510080.

The previous prime is 661151151151. The next prime is 661151151191.

661151151166 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165190 + ... + 1161718.

It is an arithmetic number, because the mean of its divisors is an integer number (34507342575).

Almost surely, 2^661151151166 is an apocalyptic number.

661151151166 is a deficient number, since it is larger than the sum of its proper divisors (443083811234).

661151151166 is a wasteful number, since it uses less digits than its factorization.

661151151166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997164.

The product of its digits is 32400, while the sum is 40.

The spelling of 661151151166 in words is "six hundred sixty-one billion, one hundred fifty-one million, one hundred fifty-one thousand, one hundred sixty-six".