166361554 has 8 divisors (see below), whose sum is σ = 250431228. Its totient is φ = 82884480.

The previous prime is 166361543. The next prime is 166361557. The reversal of 166361554 is 455163661.

It can be written as a sum of positive squares in 2 ways, for example, as 132779529 + 33582025 = 11523^2 + 5795^2 .

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 (166361557) 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, 147447 + ... + 148570.

Almost surely, 2^166361554 is an apocalyptic number.

166361554 is a deficient number, since it is larger than the sum of its proper divisors (84069674).

166361554 is a wasteful number, since it uses less digits than its factorization.

166361554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296300.

The product of its digits is 64800, while the sum is 37.

The square root of 166361554 is about 12898.1221113773. The cubic root of 166361554 is about 549.9851830719.

The spelling of 166361554 in words is "one hundred sixty-six million, three hundred sixty-one thousand, five hundred fifty-four".