621222166 has 16 divisors (see below), whose sum is σ = 965487600. Its totient is φ = 299426848.

The previous prime is 621222163. The next prime is 621222167. The reversal of 621222166 is 661222126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621222163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30096 + ... + 46348.

It is an arithmetic number, because the mean of its divisors is an integer number (60342975).

Almost surely, 2^621222166 is an apocalyptic number.

621222166 is a deficient number, since it is larger than the sum of its proper divisors (344265434).

621222166 is a wasteful number, since it uses less digits than its factorization.

621222166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16943.

The product of its digits is 3456, while the sum is 28.

The square root of 621222166 is about 24924.3287973819. The cubic root of 621222166 is about 853.2618226546.

The spelling of 621222166 in words is "six hundred twenty-one million, two hundred twenty-two thousand, one hundred sixty-six".