666001053 has 24 divisors (see below), whose sum is σ = 1019378880. Its totient is φ = 417830400.

The previous prime is 666001051. The next prime is 666001057. The reversal of 666001053 is 350100666.

It is not a de Polignac number, because 666001053 - 2¹ = 666001051 is a prime.

666001053 is a modest number, since divided by 1053 gives 666 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666001051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12925 + ... + 38717.

It is an arithmetic number, because the mean of its divisors is an integer number (42474120).

Almost surely, 2^666001053 is an apocalyptic number.

It is an amenable number.

666001053 is a deficient number, since it is larger than the sum of its proper divisors (353377827).

666001053 is a wasteful number, since it uses less digits than its factorization.

666001053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25969 (or 25966 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 666001053 is about 25806.9962025804. The cubic root of 666001053 is about 873.2896343764.

The spelling of 666001053 in words is "six hundred sixty-six million, one thousand, fifty-three".