2166000620 has 96 divisors (see below), whose sum is σ = 5449586688. Its totient is φ = 707046912.

The previous prime is 2166000563. The next prime is 2166000623. The reversal of 2166000620 is 260006612.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (2166000623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 748817 + ... + 751703.

It is an arithmetic number, because the mean of its divisors is an integer number (56766528).

Almost surely, 2^2166000620 is an apocalyptic number.

2166000620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166000620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2724793344).

2166000620 is an abundant number, since it is smaller than the sum of its proper divisors (3283586068).

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

2166000620 is a wasteful number, since it uses less digits than its factorization.

2166000620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159 (or 3157 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2166000620 is about 46540.3117737731. The cubic root of 2166000620 is about 1293.8567390910.

The spelling of 2166000620 in words is "two billion, one hundred sixty-six million, six hundred twenty", and thus it is an aban number.