166666474 has 8 divisors (see below), whose sum is σ = 269230500. Its totient is φ = 76922976.

The previous prime is 166666469. The next prime is 166666481. The reversal of 166666474 is 474666661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 166539025 + 127449 = 12905^2 + 357^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3205099 + ... + 3205150.

Almost surely, 2^166666474 is an apocalyptic number.

166666474 is a deficient number, since it is larger than the sum of its proper divisors (102564026).

166666474 is a wasteful number, since it uses less digits than its factorization.

166666474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410264.

The product of its digits is 870912, while the sum is 46.

The square root of 166666474 is about 12909.9370254080. The cubic root of 166666474 is about 550.3209960919.

It can be divided in two parts, 16666647 and 4, that added together give a triangular number (16666651 = T₅₇₇₃).

The spelling of 166666474 in words is "one hundred sixty-six million, six hundred sixty-six thousand, four hundred seventy-four".