666660453 has 8 divisors (see below), whose sum is σ = 889038816. Its totient is φ = 444361200.

The previous prime is 666660443. The next prime is 666660461. The reversal of 666660453 is 354066666.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-666660453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666660403) 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, 3958 + ... + 36728.

It is an arithmetic number, because the mean of its divisors is an integer number (111129852).

Almost surely, 2^666660453 is an apocalyptic number.

It is an amenable number.

666660453 is a deficient number, since it is larger than the sum of its proper divisors (222378363).

666660453 is a wasteful number, since it uses less digits than its factorization.

666660453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39555.

The product of its (nonzero) digits is 466560, while the sum is 42.

The square root of 666660453 is about 25819.7686472981. The cubic root of 666660453 is about 873.5777506590.

The spelling of 666660453 in words is "six hundred sixty-six million, six hundred sixty thousand, four hundred fifty-three".