1646420166 has 24 divisors (see below), whose sum is σ = 3568701240. Its totient is φ = 548582496.

The previous prime is 1646420159. The next prime is 1646420177. The reversal of 1646420166 is 6610246461.

1646420166 is a `hidden beast` number, since 1 + 6 + 4 + 642 + 0 + 1 + 6 + 6 = 666.

It is a super-2 number, since 2×1646420166² = 5421398726022935112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1646420166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30025 + ... + 64763.

It is an arithmetic number, because the mean of its divisors is an integer number (148695885).

Almost surely, 2^1646420166 is an apocalyptic number.

1646420166 is an abundant number, since it is smaller than the sum of its proper divisors (1922281074).

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

1646420166 is a wasteful number, since it uses less digits than its factorization.

1646420166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37380 (or 37377 counting only the distinct ones).

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

The square root of 1646420166 is about 40576.1033861065. The cubic root of 1646420166 is about 1180.8105524524.

The spelling of 1646420166 in words is "one billion, six hundred forty-six million, four hundred twenty thousand, one hundred sixty-six".