1166681357 has 4 divisors (see below), whose sum is σ = 1170433056. Its totient is φ = 1162929660.

The previous prime is 1166681353. The next prime is 1166681381. The reversal of 1166681357 is 7531866611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1166681357 - 2² = 1166681353 is a prime.

It is a super-2 number, since 2×1166681357² = 2722290777542722898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166681353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1875383 + ... + 1876004.

It is an arithmetic number, because the mean of its divisors is an integer number (292608264).

Almost surely, 2^1166681357 is an apocalyptic number.

It is an amenable number.

1166681357 is a deficient number, since it is larger than the sum of its proper divisors (3751699).

1166681357 is an equidigital number, since it uses as much as digits as its factorization.

1166681357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751698.

The product of its digits is 181440, while the sum is 44.

The square root of 1166681357 is about 34156.7175969823. The cubic root of 1166681357 is about 1052.7310181350.

The spelling of 1166681357 in words is "one billion, one hundred sixty-six million, six hundred eighty-one thousand, three hundred fifty-seven".