166212898 has 4 divisors (see below), whose sum is σ = 249319350. Its totient is φ = 83106448.

The previous prime is 166212889. The next prime is 166212899. The reversal of 166212898 is 898212661.

It is a happy number.

166212898 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 898212661 = 4127 ⋅217643.

It can be written as a sum of positive squares in only one way, i.e., 146967129 + 19245769 = 12123^2 + 4387^2 .

It is not an unprimeable number, because it can be changed into a prime (166212899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41553223 + ... + 41553226.

Almost surely, 2^166212898 is an apocalyptic number.

166212898 is a deficient number, since it is larger than the sum of its proper divisors (83106452).

166212898 is an equidigital number, since it uses as much as digits as its factorization.

166212898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83106451.

The product of its digits is 82944, while the sum is 43.

The square root of 166212898 is about 12892.3581240982. The cubic root of 166212898 is about 549.8213171628.

The spelling of 166212898 in words is "one hundred sixty-six million, two hundred twelve thousand, eight hundred ninety-eight".