666951053 has 16 divisors (see below), whose sum is σ = 711480000. Its totient is φ = 623417472.

The previous prime is 666951049. The next prime is 666951071. The reversal of 666951053 is 350159666.

It is a cyclic number.

It is not a de Polignac number, because 666951053 - 2² = 666951049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 666951053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666951023) 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, 635273 + ... + 636321.

It is an arithmetic number, because the mean of its divisors is an integer number (44467500).

Almost surely, 2^666951053 is an apocalyptic number.

It is an amenable number.

666951053 is a deficient number, since it is larger than the sum of its proper divisors (44528947).

666951053 is a wasteful number, since it uses less digits than its factorization.

666951053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 666951053 is about 25825.3955051999. The cubic root of 666951053 is about 873.7046642503.

The spelling of 666951053 in words is "six hundred sixty-six million, nine hundred fifty-one thousand, fifty-three".