2166221101662 has 48 divisors (see below), whose sum is σ = 4976478336960. Its totient is φ = 678653508096.

The previous prime is 2166221101661. The next prime is 2166221101663. The reversal of 2166221101662 is 2661011226612.

2166221101662 is a `hidden beast` number, since 2 + 1 + 6 + 622 + 1 + 10 + 16 + 6 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (2166221101661) and next prime (2166221101663).

It is a super-2 number, since 2×2166221101662² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166221101661) 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, 4702903 + ... + 5142930.

It is an arithmetic number, because the mean of its divisors is an integer number (103676632020).

Almost surely, 2^{2166221101662} is an apocalyptic number.

2166221101662 is an abundant number, since it is smaller than the sum of its proper divisors (2810257235298).

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

2166221101662 is a wasteful number, since it uses less digits than its factorization.

2166221101662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9846577 (or 9846574 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 2166221101662 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, one hundred one thousand, six hundred sixty-two".