166642450 has 96 divisors (see below), whose sum is σ = 353258640. Its totient is φ = 58406400.

The previous prime is 166642433. The next prime is 166642471. The reversal of 166642450 is 54246661.

166642450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 24 ways, for example, as 141871921 + 24770529 = 11911^2 + 4977^2 .

It is a super-2 number, since 2×166642450² = 55539412284005000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4064430 + ... + 4064470.

Almost surely, 2^166642450 is an apocalyptic number.

166642450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166642450 is an abundant number, since it is smaller than the sum of its proper divisors (186616190).

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

166642450 is a wasteful number, since it uses less digits than its factorization.

166642450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 166642450 is about 12909.0065458191. The cubic root of 166642450 is about 550.2945529675.

It can be divided in two parts, 16 and 6642450, that added together give a palindrome (6642466).

The spelling of 166642450 in words is "one hundred sixty-six million, six hundred forty-two thousand, four hundred fifty".