1166661616 has 20 divisors (see below), whose sum is σ = 2272247424. Its totient is φ = 580275200.

The previous prime is 1166661581. The next prime is 1166661653. The reversal of 1166661616 is 6161666611.

It is a super-2 number, since 2×1166661616² = 2722198652495462912, 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 3 ways as a sum of consecutive naturals, for example, 187825 + ... + 193936.

Almost surely, 2^1166661616 is an apocalyptic number.

1166661616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1166661616 is a deficient number, since it is larger than the sum of its proper divisors (1105585808).

1166661616 is a wasteful number, since it uses less digits than its factorization.

1166661616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381960 (or 381954 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 1166661616 is about 34156.4286189291. The cubic root of 1166661616 is about 1052.7250804726.

The spelling of 1166661616 in words is "one billion, one hundred sixty-six million, six hundred sixty-one thousand, six hundred sixteen".