166240398 has 8 divisors (see below), whose sum is σ = 332480808. Its totient is φ = 55413464.

The previous prime is 166240397. The next prime is 166240409. The reversal of 166240398 is 893042661.

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

166240398 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166240397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13853361 + ... + 13853372.

It is an arithmetic number, because the mean of its divisors is an integer number (41560101).

Almost surely, 2^166240398 is an apocalyptic number.

166240398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166240398 is a wasteful number, since it uses less digits than its factorization.

166240398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27706738.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 166240398 is about 12893.4246032619. The cubic root of 166240398 is about 549.8516382201.

The spelling of 166240398 in words is "one hundred sixty-six million, two hundred forty thousand, three hundred ninety-eight".