161166554 has 8 divisors (see below), whose sum is σ = 242142240. Its totient is φ = 80452476.

The previous prime is 161166547. The next prime is 161166559. The reversal of 161166554 is 455661161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (161166559) 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, 63854 + ... + 66329.

It is an arithmetic number, because the mean of its divisors is an integer number (30267780).

Almost surely, 2^161166554 is an apocalyptic number.

161166554 is a deficient number, since it is larger than the sum of its proper divisors (80975686).

161166554 is a wasteful number, since it uses less digits than its factorization.

161166554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130804.

The product of its digits is 21600, while the sum is 35.

The square root of 161166554 is about 12695.1389909682. The cubic root of 161166554 is about 544.1997108616.

The spelling of 161166554 in words is "one hundred sixty-one million, one hundred sixty-six thousand, five hundred fifty-four".