1166372287 has 6 divisors (see below), whose sum is σ = 1172115168. Its totient is φ = 1160634204.

The previous prime is 1166372243. The next prime is 1166372299. The reversal of 1166372287 is 7822736611.

It is not a de Polignac number, because 1166372287 - 2¹¹ = 1166370239 is a prime.

It is a super-2 number, since 2×1166372287² = 2720848623763220738, 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 (1166372087) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508858 + ... + 511144.

It is an arithmetic number, because the mean of its divisors is an integer number (195352528).

Almost surely, 2^1166372287 is an apocalyptic number.

1166372287 is a deficient number, since it is larger than the sum of its proper divisors (5742881).

1166372287 is an frugal number, since it uses more digits than its factorization.

1166372287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797 (or 2510 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 1166372287 is about 34152.1930042567. The cubic root of 1166372287 is about 1052.6380489310.

The spelling of 1166372287 in words is "one billion, one hundred sixty-six million, three hundred seventy-two thousand, two hundred eighty-seven".