166954426 has 4 divisors (see below), whose sum is σ = 250431642. Its totient is φ = 83477212.

The previous prime is 166954393. The next prime is 166954453. The reversal of 166954426 is 624459661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624459661 = 7 ⋅89208523.

It can be written as a sum of positive squares in only one way, i.e., 117744201 + 49210225 = 10851^2 + 7015^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41738605 + ... + 41738608.

Almost surely, 2^166954426 is an apocalyptic number.

166954426 is a deficient number, since it is larger than the sum of its proper divisors (83477216).

166954426 is an equidigital number, since it uses as much as digits as its factorization.

166954426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83477215.

The product of its digits is 311040, while the sum is 43.

The square root of 166954426 is about 12921.0845520026. The cubic root of 166954426 is about 550.6377461734.

The spelling of 166954426 in words is "one hundred sixty-six million, nine hundred fifty-four thousand, four hundred twenty-six".