222665663538 has 48 divisors (see below), whose sum is σ = 506624654016. Its totient is φ = 70542632160.

The previous prime is 222665663527. The next prime is 222665663543. The reversal of 222665663538 is 835366566222.

222665663538 is a `hidden beast` number, since 2 + 2 + 26 + 6 + 566 + 3 + 53 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1647868 + ... + 1777863.

It is an arithmetic number, because the mean of its divisors is an integer number (10554680292).

Almost surely, 2^222665663538 is an apocalyptic number.

222665663538 is an abundant number, since it is smaller than the sum of its proper divisors (283958990478).

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

222665663538 is a wasteful number, since it uses less digits than its factorization.

222665663538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425919 (or 3425916 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 54.

The spelling of 222665663538 in words is "two hundred twenty-two billion, six hundred sixty-five million, six hundred sixty-three thousand, five hundred thirty-eight".