166901253 has 4 divisors (see below), whose sum is σ = 222535008. Its totient is φ = 111267500.

The previous prime is 166901249. The next prime is 166901261. The reversal of 166901253 is 352109661.

It is a happy number.

166901253 is digitally balanced in base 2, 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 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 166901253 - 2² = 166901249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166901233) 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, 27816873 + ... + 27816878.

It is an arithmetic number, because the mean of its divisors is an integer number (55633752).

Almost surely, 2^166901253 is an apocalyptic number.

It is an amenable number.

166901253 is a deficient number, since it is larger than the sum of its proper divisors (55633755).

166901253 is an equidigital number, since it uses as much as digits as its factorization.

166901253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55633754.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 166901253 is about 12919.0267822309. The cubic root of 166901253 is about 550.5792827741.

The spelling of 166901253 in words is "one hundred sixty-six million, nine hundred one thousand, two hundred fifty-three".