1166649388 has 24 divisors (see below), whose sum is σ = 2054001600. Its totient is φ = 579803280.

The previous prime is 1166649377. The next prime is 1166649389. The reversal of 1166649388 is 8839466611.

It is a super-2 number, since 2×1166649388² = 2722141589041549088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1166649389) 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, 554763 + ... + 556861.

It is an arithmetic number, because the mean of its divisors is an integer number (85583400).

Almost surely, 2^1166649388 is an apocalyptic number.

It is an amenable number.

1166649388 is a deficient number, since it is larger than the sum of its proper divisors (887352212).

1166649388 is a wasteful number, since it uses less digits than its factorization.

1166649388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877 (or 2875 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 52.

The square root of 1166649388 is about 34156.2496184812. The cubic root of 1166649388 is about 1052.7214025232.

The spelling of 1166649388 in words is "one billion, one hundred sixty-six million, six hundred forty-nine thousand, three hundred eighty-eight".