166344478 has 8 divisors (see below), whose sum is σ = 250561440. Its totient is φ = 82824000.

The previous prime is 166344467. The next prime is 166344509. The reversal of 166344478 is 874443661.

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

It is a super-2 number, since 2×166344478² = 55340970722184968, 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 3 ways as a sum of consecutive naturals, for example, 173523 + ... + 174478.

It is an arithmetic number, because the mean of its divisors is an integer number (31320180).

Almost surely, 2^166344478 is an apocalyptic number.

166344478 is a deficient number, since it is larger than the sum of its proper divisors (84216962).

166344478 is a wasteful number, since it uses less digits than its factorization.

166344478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348242.

The product of its digits is 387072, while the sum is 43.

The square root of 166344478 is about 12897.4601375620. The cubic root of 166344478 is about 549.9663648852.

It can be divided in two parts, 16634 and 4478, that added together give a palindrome (21112).

The spelling of 166344478 in words is "one hundred sixty-six million, three hundred forty-four thousand, four hundred seventy-eight".