220486664 has 8 divisors (see below), whose sum is σ = 413412510. Its totient is φ = 110243328.

The previous prime is 220486649. The next prime is 220486687. The reversal of 220486664 is 466684022.

It can be written as a sum of positive squares in only one way, i.e., 177688900 + 42797764 = 13330^2 + 6542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×220486664³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13780409 + ... + 13780424.

Almost surely, 2^220486664 is an apocalyptic number.

It is an amenable number.

220486664 is a deficient number, since it is larger than the sum of its proper divisors (192925846).

220486664 is a wasteful number, since it uses less digits than its factorization.

220486664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27560839 (or 27560835 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 220486664 is about 14848.7933516498. The cubic root of 220486664 is about 604.1258819830.

The spelling of 220486664 in words is "two hundred twenty million, four hundred eighty-six thousand, six hundred sixty-four".