1166561354 has 16 divisors (see below), whose sum is σ = 2105073600. Its totient is φ = 473641344.

The previous prime is 1166561353. The next prime is 1166561371. The reversal of 1166561354 is 4531656611.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (1166561351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2192519 + ... + 2193050.

It is an arithmetic number, because the mean of its divisors is an integer number (131567100).

Almost surely, 2^1166561354 is an apocalyptic number.

1166561354 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1166561354 is a deficient number, since it is larger than the sum of its proper divisors (938512246).

1166561354 is a wasteful number, since it uses less digits than its factorization.

1166561354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385597.

The product of its digits is 64800, while the sum is 38.

The square root of 1166561354 is about 34154.9608988211. The cubic root of 1166561354 is about 1052.6949228147.

The spelling of 1166561354 in words is "one billion, one hundred sixty-six million, five hundred sixty-one thousand, three hundred fifty-four".