166404346774 has 16 divisors (see below), whose sum is σ = 261287341056. Its totient is φ = 79384170600.

The previous prime is 166404346741. The next prime is 166404346793. The reversal of 166404346774 is 477643404661.

It is a happy number.

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, 18896592 + ... + 18905395.

It is an arithmetic number, because the mean of its divisors is an integer number (16330458816).

Almost surely, 2^166404346774 is an apocalyptic number.

166404346774 is a deficient number, since it is larger than the sum of its proper divisors (94882994282).

166404346774 is a wasteful number, since it uses less digits than its factorization.

166404346774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37802091.

The product of its (nonzero) digits is 8128512, while the sum is 52.

The spelling of 166404346774 in words is "one hundred sixty-six billion, four hundred four million, three hundred forty-six thousand, seven hundred seventy-four".