2166657424 has 10 divisors (see below), whose sum is σ = 4197898790. Its totient is φ = 1083328704.

The previous prime is 2166657407. The next prime is 2166657439. The reversal of 2166657424 is 4247566612.

It can be written as a sum of positive squares in only one way, i.e., 1222201600 + 944455824 = 34960^2 + 30732^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67708029 + ... + 67708060.

It is an arithmetic number, because the mean of its divisors is an integer number (419789879).

Almost surely, 2^2166657424 is an apocalyptic number.

It is an amenable number.

2166657424 is a deficient number, since it is larger than the sum of its proper divisors (2031241366).

2166657424 is a wasteful number, since it uses less digits than its factorization.

2166657424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135416097 (or 135416091 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 2166657424 is about 46547.3675302911. The cubic root of 2166657424 is about 1293.9875061203.

The spelling of 2166657424 in words is "two billion, one hundred sixty-six million, six hundred fifty-seven thousand, four hundred twenty-four".