166098397 has 4 divisors (see below), whose sum is σ = 166830336. Its totient is φ = 165366460.

The previous prime is 166098391. The next prime is 166098409. The reversal of 166098397 is 793890661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166098397 - 2⁷ = 166098269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166098397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166098391) 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, 365629 + ... + 366082.

It is an arithmetic number, because the mean of its divisors is an integer number (41707584).

Almost surely, 2^166098397 is an apocalyptic number.

It is an amenable number.

166098397 is a deficient number, since it is larger than the sum of its proper divisors (731939).

166098397 is an equidigital number, since it uses as much as digits as its factorization.

166098397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731938.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 166098397 is about 12887.9167051933. The cubic root of 166098397 is about 549.6950342386.

The spelling of 166098397 in words is "one hundred sixty-six million, ninety-eight thousand, three hundred ninety-seven".