666666053 has 16 divisors (see below), whose sum is σ = 711813120. Its totient is φ = 622593216.

The previous prime is 666666031. The next prime is 666666071. The reversal of 666666053 is 350666666.

It is a de Polignac number, because none of the positive numbers 2^k-666666053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666665995 and 666666013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666666083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416651 + ... + 418247.

It is an arithmetic number, because the mean of its divisors is an integer number (44488320).

Almost surely, 2^666666053 is an apocalyptic number.

It is an amenable number.

666666053 is a deficient number, since it is larger than the sum of its proper divisors (45147067).

666666053 is a wasteful number, since it uses less digits than its factorization.

666666053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916.

The product of its (nonzero) digits is 699840, while the sum is 44.

The square root of 666666053 is about 25819.8770911095. The cubic root of 666666053 is about 873.5801966926.

The spelling of 666666053 in words is "six hundred sixty-six million, six hundred sixty-six thousand, fifty-three".