166799453 has 4 divisors (see below), whose sum is σ = 166912668. Its totient is φ = 166686240.

The previous prime is 166799449. The next prime is 166799471. The reversal of 166799453 is 354997661.

166799453 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.

It can be written as a sum of positive squares in 2 ways, for example, as 73908409 + 92891044 = 8597^2 + 9638^2 .

It is a cyclic number.

It is not a de Polignac number, because 166799453 - 2² = 166799449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166799483) 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, 54368 + ... + 57353.

It is an arithmetic number, because the mean of its divisors is an integer number (41728167).

Almost surely, 2^166799453 is an apocalyptic number.

It is an amenable number.

166799453 is a deficient number, since it is larger than the sum of its proper divisors (113215).

166799453 is a wasteful number, since it uses less digits than its factorization.

166799453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113214.

The product of its digits is 1224720, while the sum is 50.

The square root of 166799453 is about 12915.0862560031. The cubic root of 166799453 is about 550.4673196235.

The spelling of 166799453 in words is "one hundred sixty-six million, seven hundred ninety-nine thousand, four hundred fifty-three".