653540166 has 12 divisors (see below), whose sum is σ = 1416003732. Its totient is φ = 217846716.

The previous prime is 653540159. The next prime is 653540179. The reversal of 653540166 is 661045356.

653540166 is a `hidden beast` number, since 6 + 53 + 540 + 1 + 66 = 666.

It is a super-2 number, since 2×653540166² = 854229497150615112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 653540166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18153876 + ... + 18153911.

It is an arithmetic number, because the mean of its divisors is an integer number (118000311).

Almost surely, 2^653540166 is an apocalyptic number.

653540166 is an abundant number, since it is smaller than the sum of its proper divisors (762463566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

653540166 is a wasteful number, since it uses less digits than its factorization.

653540166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36307795 (or 36307792 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 653540166 is about 25564.4316580674. The cubic root of 653540166 is about 867.8088897711.

The spelling of 653540166 in words is "six hundred fifty-three million, five hundred forty thousand, one hundred sixty-six".