166246398 has 16 divisors (see below), whose sum is σ = 369436560. Its totient is φ = 55415448.

The previous prime is 166246373. The next prime is 166246433. The reversal of 166246398 is 893642661.

166246398 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 4 + 639 + 8 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1539265 + ... + 1539372.

It is an arithmetic number, because the mean of its divisors is an integer number (23089785).

Almost surely, 2^166246398 is an apocalyptic number.

166246398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166246398 is an abundant number, since it is smaller than the sum of its proper divisors (203190162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166246398 is a wasteful number, since it uses less digits than its factorization.

166246398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078648 (or 3078642 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 166246398 is about 12893.6572779022. The cubic root of 166246398 is about 549.8582532792.

The spelling of 166246398 in words is "one hundred sixty-six million, two hundred forty-six thousand, three hundred ninety-eight".