2166602643 has 12 divisors (see below), whose sum is σ = 3131745760. Its totient is φ = 1443382416.

The previous prime is 2166602629. The next prime is 2166602657. The reversal of 2166602643 is 3462066612.

It is an interprime number because it is at equal distance from previous prime (2166602629) and next prime (2166602657).

It is not a de Polignac number, because 2166602643 - 2²⁴ = 2149825427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2166602598 and 2166602607.

It is not an unprimeable number, because it can be changed into a prime (2166602443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71371 + ... + 97092.

Almost surely, 2^2166602643 is an apocalyptic number.

2166602643 is a deficient number, since it is larger than the sum of its proper divisors (965143117).

2166602643 is a wasteful number, since it uses less digits than its factorization.

2166602643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169898 (or 169895 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 2166602643 is about 46546.7790829827. The cubic root of 2166602643 is about 1293.9766004542.

The spelling of 2166602643 in words is "two billion, one hundred sixty-six million, six hundred two thousand, six hundred forty-three".