220665912 has 32 divisors (see below), whose sum is σ = 554046480. Its totient is φ = 73237760.

The previous prime is 220665877. The next prime is 220665923. The reversal of 220665912 is 219566022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14139 + ... + 25322.

Almost surely, 2^220665912 is an apocalyptic number.

It is an amenable number.

220665912 is an abundant number, since it is smaller than the sum of its proper divisors (333380568).

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

220665912 is a wasteful number, since it uses less digits than its factorization.

220665912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39703 (or 39699 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 220665912 is about 14854.8279020660. The cubic root of 220665912 is about 604.2895487592.

The spelling of 220665912 in words is "two hundred twenty million, six hundred sixty-five thousand, nine hundred twelve".