866965653 has 16 divisors (see below), whose sum is σ = 1285152960. Its totient is φ = 577635408.

The previous prime is 866965639. The next prime is 866965661. The reversal of 866965653 is 356569668.

It is not a de Polignac number, because 866965653 - 2⁵ = 866965621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866965653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866965663) 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, 42126 + ... + 59232.

It is an arithmetic number, because the mean of its divisors is an integer number (80322060).

Almost surely, 2^866965653 is an apocalyptic number.

It is an amenable number.

866965653 is a deficient number, since it is larger than the sum of its proper divisors (418187307).

866965653 is a wasteful number, since it uses less digits than its factorization.

866965653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18993 (or 18987 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The square root of 866965653 is about 29444.2804802563. The cubic root of 866965653 is about 953.5291276202.

The spelling of 866965653 in words is "eight hundred sixty-six million, nine hundred sixty-five thousand, six hundred fifty-three".