166051398 has 32 divisors (see below), whose sum is σ = 349111296. Its totient is φ = 52551488.

The previous prime is 166051397. The next prime is 166051399. The reversal of 166051398 is 893150661.

It is an interprime number because it is at equal distance from previous prime (166051397) and next prime (166051399).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166051397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14515 + ... + 23297.

It is an arithmetic number, because the mean of its divisors is an integer number (10909728).

Almost surely, 2^166051398 is an apocalyptic number.

166051398 is an abundant number, since it is smaller than the sum of its proper divisors (183059898).

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

166051398 is a wasteful number, since it uses less digits than its factorization.

166051398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8948.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 166051398 is about 12886.0932015875. The cubic root of 166051398 is about 549.6431823354.

The spelling of 166051398 in words is "one hundred sixty-six million, fifty-one thousand, three hundred ninety-eight".