1642622166 has 28 divisors (see below), whose sum is σ = 3694213212. Its totient is φ = 547540236.

The previous prime is 1642622117. The next prime is 1642622173. The reversal of 1642622166 is 6612262461.

1642622166 is a `hidden beast` number, since 1 + 6 + 426 + 221 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1642622166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 561856 + ... + 564771.

Almost surely, 2^1642622166 is an apocalyptic number.

1642622166 is an abundant number, since it is smaller than the sum of its proper divisors (2051591046).

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

1642622166 is an equidigital number, since it uses as much as digits as its factorization.

1642622166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126647 (or 1126632 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 1642622166 is about 40529.2754191338. The cubic root of 1642622166 is about 1179.9018797087.

The spelling of 1642622166 in words is "one billion, six hundred forty-two million, six hundred twenty-two thousand, one hundred sixty-six".