1166646625 has 16 divisors (see below), whose sum is σ = 1457361360. Its totient is φ = 932428800.

The previous prime is 1166646619. The next prime is 1166646629. The reversal of 1166646625 is 5266466611.

It can be written as a sum of positive squares in 8 ways, for example, as 186267904 + 980378721 = 13648^2 + 31311^2 .

It is not a de Polignac number, because 1166646625 - 2⁷ = 1166646497 is a prime.

It is a super-2 number, since 2×1166646625² = 2722128695247781250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1166646629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148291 + ... + 155959.

It is an arithmetic number, because the mean of its divisors is an integer number (91085085).

Almost surely, 2^1166646625 is an apocalyptic number.

It is an amenable number.

1166646625 is a deficient number, since it is larger than the sum of its proper divisors (290714735).

1166646625 is an equidigital number, since it uses as much as digits as its factorization.

1166646625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8901 (or 8891 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 1166646625 is about 34156.2091719793. The cubic root of 1166646625 is about 1052.7205714618.

The spelling of 1166646625 in words is "one billion, one hundred sixty-six million, six hundred forty-six thousand, six hundred twenty-five".