166540254 has 16 divisors (see below), whose sum is σ = 334773648. Its totient is φ = 55231232.

The previous prime is 166540207. The next prime is 166540267. The reversal of 166540254 is 452045661.

166540254 = 6² + 7² + ... + 793².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69267 + ... + 71630.

It is an arithmetic number, because the mean of its divisors is an integer number (20923353).

Almost surely, 2^166540254 is an apocalyptic number.

166540254 is an abundant number, since it is smaller than the sum of its proper divisors (168233394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166540254 is a wasteful number, since it uses less digits than its factorization.

166540254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141099.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 166540254 is about 12905.0476171148. The cubic root of 166540254 is about 550.1820378145.

The spelling of 166540254 in words is "one hundred sixty-six million, five hundred forty thousand, two hundred fifty-four".