166263479 has 4 divisors (see below), whose sum is σ = 168368160. Its totient is φ = 164158800.

The previous prime is 166263443. The next prime is 166263511. The reversal of 166263479 is 974362661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974362661 = 701 ⋅1389961.

It is a cyclic number.

It is not a de Polignac number, because 166263479 - 2²⁴ = 149486263 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 (166263679) 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, 1052222 + ... + 1052379.

It is an arithmetic number, because the mean of its divisors is an integer number (42092040).

Almost surely, 2^166263479 is an apocalyptic number.

166263479 is a deficient number, since it is larger than the sum of its proper divisors (2104681).

166263479 is an equidigital number, since it uses as much as digits as its factorization.

166263479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104680.

The product of its digits is 326592, while the sum is 44.

The square root of 166263479 is about 12894.3196408341. The cubic root of 166263479 is about 549.8770843782.

The spelling of 166263479 in words is "one hundred sixty-six million, two hundred sixty-three thousand, four hundred seventy-nine".