166454477 has 4 divisors (see below), whose sum is σ = 190233696. Its totient is φ = 142675260.

The previous prime is 166454471. The next prime is 166454513. The reversal of 166454477 is 774454661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 774454661 = 16651 ⋅46511.

It is not a de Polignac number, because 166454477 - 2⁶ = 166454413 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 (166454471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11889599 + ... + 11889612.

It is an arithmetic number, because the mean of its divisors is an integer number (47558424).

Almost surely, 2^166454477 is an apocalyptic number.

It is an amenable number.

166454477 is a deficient number, since it is larger than the sum of its proper divisors (23779219).

166454477 is an equidigital number, since it uses as much as digits as its factorization.

166454477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23779218.

The product of its digits is 564480, while the sum is 44.

The square root of 166454477 is about 12901.7237995548. The cubic root of 166454477 is about 550.0875640199.

The spelling of 166454477 in words is "one hundred sixty-six million, four hundred fifty-four thousand, four hundred seventy-seven".