220660704 has 72 divisors (see below), whose sum is σ = 684559512. Its totient is φ = 66865920.

The previous prime is 220660691. The next prime is 220660709. The reversal of 220660704 is 407066022.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×220660704² = 97382292579551232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220660709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31659 + ... + 37994.

It is an arithmetic number, because the mean of its divisors is an integer number (9507771).

Almost surely, 2^220660704 is an apocalyptic number.

220660704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220660704 is an abundant number, since it is smaller than the sum of its proper divisors (463898808).

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

220660704 is a wasteful number, since it uses less digits than its factorization.

220660704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69680 (or 69669 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 220660704 is about 14854.6526044873. The cubic root of 220660704 is about 604.2847947177.

The spelling of 220660704 in words is "two hundred twenty million, six hundred sixty thousand, seven hundred four".