220666536 has 48 divisors (see below), whose sum is σ = 598521300. Its totient is φ = 73446912.

The previous prime is 220666529. The next prime is 220666541. The reversal of 220666536 is 635666022.

It can be written as a sum of positive squares in 2 ways, for example, as 211702500 + 8964036 = 14550^2 + 2994^2 .

It is a super-2 number, since 2×220666536² = 97387440220478592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 220666536.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57840 + ... + 61536.

Almost surely, 2^220666536 is an apocalyptic number.

It is an amenable number.

220666536 is an abundant number, since it is smaller than the sum of its proper divisors (377854764).

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

220666536 is a wasteful number, since it uses less digits than its factorization.

220666536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4538 (or 4531 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 220666536 is about 14854.8489053238. The cubic root of 220666536 is about 604.2901183628.

The spelling of 220666536 in words is "two hundred twenty million, six hundred sixty-six thousand, five hundred thirty-six".