220166687 has 24 divisors (see below), whose sum is σ = 248194800. Its totient is φ = 194109696.

The previous prime is 220166671. The next prime is 220166689. The reversal of 220166687 is 786661022.

It is a happy number.

It is not a de Polignac number, because 220166687 - 2⁴ = 220166671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220166687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220166689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1583864 + ... + 1584002.

It is an arithmetic number, because the mean of its divisors is an integer number (10341450).

Almost surely, 2^220166687 is an apocalyptic number.

220166687 is a deficient number, since it is larger than the sum of its proper divisors (28028113).

220166687 is a wasteful number, since it uses less digits than its factorization.

220166687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 220166687 is about 14838.0149278803. The cubic root of 220166687 is about 603.8334985043.

The spelling of 220166687 in words is "two hundred twenty million, one hundred sixty-six thousand, six hundred eighty-seven".