2166904726 has 8 divisors (see below), whose sum is σ = 3714693840. Its totient is φ = 928673448.

The previous prime is 2166904721. The next prime is 2166904757. The reversal of 2166904726 is 6274096612.

It is a happy number.

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

It is a super-2 number, since 2×2166904726² = 9390952183122270152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166904721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77389441 + ... + 77389468.

It is an arithmetic number, because the mean of its divisors is an integer number (464336730).

Almost surely, 2^2166904726 is an apocalyptic number.

2166904726 is a deficient number, since it is larger than the sum of its proper divisors (1547789114).

2166904726 is a wasteful number, since it uses less digits than its factorization.

2166904726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154778918.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 2166904726 is about 46550.0239097683. The cubic root of 2166904726 is about 1294.0367361032.

The spelling of 2166904726 in words is "two billion, one hundred sixty-six million, nine hundred four thousand, seven hundred twenty-six".