166457477 has 4 divisors (see below), whose sum is σ = 172197420. Its totient is φ = 160717536.

The previous prime is 166457449. The next prime is 166457479. The reversal of 166457477 is 774754661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74891716 + 91565761 = 8654^2 + 9569^2 .

It is not a de Polignac number, because 166457477 - 2¹² = 166453381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166457479) 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, 2869928 + ... + 2869985.

It is an arithmetic number, because the mean of its divisors is an integer number (43049355).

Almost surely, 2^166457477 is an apocalyptic number.

It is an amenable number.

166457477 is a deficient number, since it is larger than the sum of its proper divisors (5739943).

166457477 is an equidigital number, since it uses as much as digits as its factorization.

166457477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5739942.

The product of its digits is 987840, while the sum is 47.

The square root of 166457477 is about 12901.8400625647. The cubic root of 166457477 is about 550.0908687328.

The spelling of 166457477 in words is "one hundred sixty-six million, four hundred fifty-seven thousand, four hundred seventy-seven".