1166161651 has 4 divisors (see below), whose sum is σ = 1227538600. Its totient is φ = 1104784704.

The previous prime is 1166161637. The next prime is 1166161681. The reversal of 1166161651 is 1561616611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1166161651 - 2¹³ = 1166153459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166161681) 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, 30688446 + ... + 30688483.

It is an arithmetic number, because the mean of its divisors is an integer number (306884650).

Almost surely, 2^1166161651 is an apocalyptic number.

1166161651 is a deficient number, since it is larger than the sum of its proper divisors (61376949).

1166161651 is an equidigital number, since it uses as much as digits as its factorization.

1166161651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61376948.

The product of its digits is 6480, while the sum is 34.

The square root of 1166161651 is about 34149.1090806188. The cubic root of 1166161651 is about 1052.5746795651.

The spelling of 1166161651 in words is "one billion, one hundred sixty-six million, one hundred sixty-one thousand, six hundred fifty-one".