166440453 has 8 divisors (see below), whose sum is σ = 221999616. Its totient is φ = 110920800.

The previous prime is 166440451. The next prime is 166440499. The reversal of 166440453 is 354044661.

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

It is not a de Polignac number, because 166440453 - 2¹ = 166440451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166440451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1993 + ... + 18353.

It is an arithmetic number, because the mean of its divisors is an integer number (27749952).

Almost surely, 2^166440453 is an apocalyptic number.

It is an amenable number.

166440453 is a deficient number, since it is larger than the sum of its proper divisors (55559163).

166440453 is a wasteful number, since it uses less digits than its factorization.

166440453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19755.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 166440453 is about 12901.1802948412. The cubic root of 166440453 is about 550.0721150619.

The spelling of 166440453 in words is "one hundred sixty-six million, four hundred forty thousand, four hundred fifty-three".