1165631966 has 16 divisors (see below), whose sum is σ = 1779436080. Its totient is φ = 572501760.

The previous prime is 1165631947. The next prime is 1165631983. The reversal of 1165631966 is 6691365611.

It is a happy number.

It is a super-2 number, since 2×1165631966² = 2717395760322050312, which contains 22 as substring.

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, 197336 + ... + 203156.

It is an arithmetic number, because the mean of its divisors is an integer number (111214755).

Almost surely, 2^1165631966 is an apocalyptic number.

1165631966 is a deficient number, since it is larger than the sum of its proper divisors (613804114).

1165631966 is a wasteful number, since it uses less digits than its factorization.

1165631966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579.

The product of its digits is 174960, while the sum is 44.

The square root of 1165631966 is about 34141.3527265690. The cubic root of 1165631966 is about 1052.4152912983.

The spelling of 1165631966 in words is "one billion, one hundred sixty-five million, six hundred thirty-one thousand, nine hundred sixty-six".