166257461 has 4 divisors (see below), whose sum is σ = 166322112. Its totient is φ = 166192812.

The previous prime is 166257431. The next prime is 166257473. The reversal of 166257461 is 164752661.

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.

It is a cyclic number.

It is not a de Polignac number, because 166257461 - 2²⁶ = 99148597 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 (166257431) 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, 28301 + ... + 33666.

It is an arithmetic number, because the mean of its divisors is an integer number (41580528).

Almost surely, 2^166257461 is an apocalyptic number.

It is an amenable number.

166257461 is a deficient number, since it is larger than the sum of its proper divisors (64651).

166257461 is an equidigital number, since it uses as much as digits as its factorization.

166257461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64650.

The product of its digits is 60480, while the sum is 38.

The square root of 166257461 is about 12894.0862801518. The cubic root of 166257461 is about 549.8704499282.

It can be divided in two parts, 16625 and 7461, that multiplied together give a triangular number (124039125 = T₁₅₇₅₀).

The spelling of 166257461 in words is "one hundred sixty-six million, two hundred fifty-seven thousand, four hundred sixty-one".