166346415 has 24 divisors (see below), whose sum is σ = 289297008. Its totient is φ = 88421760.

The previous prime is 166346399. The next prime is 166346417. The reversal of 166346415 is 514643661.

It is a happy number.

166346415 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 4 + 641 + 5 = 666.

It is not a de Polignac number, because 166346415 - 2⁴ = 166346399 is a prime.

It is a super-2 number, since 2×166346415² = 55342259566704450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166346415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166346417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7795 + ... + 19835.

It is an arithmetic number, because the mean of its divisors is an integer number (12054042).

Almost surely, 2^166346415 is an apocalyptic number.

166346415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166346415 is a deficient number, since it is larger than the sum of its proper divisors (122950593).

166346415 is a wasteful number, since it uses less digits than its factorization.

166346415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12359 (or 12356 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 166346415 is about 12897.5352296476. The cubic root of 166346415 is about 549.9684995733.

The spelling of 166346415 in words is "one hundred sixty-six million, three hundred forty-six thousand, four hundred fifteen".