166144774 has 16 divisors (see below), whose sum is σ = 264182688. Its totient is φ = 78095232.

The previous prime is 166144753. The next prime is 166144789. The reversal of 166144774 is 477441661.

166144774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166144774² = 55208171855022152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33844 + ... + 38440.

It is an arithmetic number, because the mean of its divisors is an integer number (16511418).

Almost surely, 2^166144774 is an apocalyptic number.

166144774 is a deficient number, since it is larger than the sum of its proper divisors (98037914).

166144774 is a wasteful number, since it uses less digits than its factorization.

166144774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679.

The product of its digits is 112896, while the sum is 40.

The square root of 166144774 is about 12889.7158230894. The cubic root of 166144774 is about 549.7461903299.

It can be divided in two parts, 1661447 and 74, that added together give a square (1661521 = 1289²).

The spelling of 166144774 in words is "one hundred sixty-six million, one hundred forty-four thousand, seven hundred seventy-four".