1166540551 has 24 divisors (see below), whose sum is σ = 1336884080. Its totient is φ = 1016167680.

The previous prime is 1166540539. The next prime is 1166540567. The reversal of 1166540551 is 1550456611.

It is not a de Polignac number, because 1166540551 - 2¹³ = 1166532359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166540581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 298015 + ... + 301903.

Almost surely, 2^1166540551 is an apocalyptic number.

1166540551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1166540551 is a deficient number, since it is larger than the sum of its proper divisors (170343529).

1166540551 is a wasteful number, since it uses less digits than its factorization.

1166540551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015 (or 4004 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1166540551 is about 34154.6563589798. The cubic root of 1166540551 is about 1052.6886652948.

The spelling of 1166540551 in words is "one billion, one hundred sixty-six million, five hundred forty thousand, five hundred fifty-one".