2166537 has 8 divisors (see below), whose sum is σ = 2936320. Its totient is φ = 1420560.

The previous prime is 2166533. The next prime is 2166547. The reversal of 2166537 is 7356612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2166537 - 2² = 2166533 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166533) 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, 5737 + ... + 6102.

It is an arithmetic number, because the mean of its divisors is an integer number (367040).

2^2166537 is an apocalyptic number.

It is an amenable number.

2166537 is a deficient number, since it is larger than the sum of its proper divisors (769783).

2166537 is a wasteful number, since it uses less digits than its factorization.

2166537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11903.

The product of its digits is 7560, while the sum is 30.

The square root of 2166537 is about 1471.9160981523. The cubic root of 2166537 is about 129.3963532166.

The spelling of 2166537 in words is "two million, one hundred sixty-six thousand, five hundred thirty-seven".