2156606966 has 8 divisors (see below), whose sum is σ = 3280472784. Its totient is φ = 1063116040.

The previous prime is 2156606957. The next prime is 2156607007. The reversal of 2156606966 is 6696066512.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2156606966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7593545 + ... + 7593828.

It is an arithmetic number, because the mean of its divisors is an integer number (410059098).

Almost surely, 2^2156606966 is an apocalyptic number.

2156606966 is a deficient number, since it is larger than the sum of its proper divisors (1123865818).

2156606966 is a wasteful number, since it uses less digits than its factorization.

2156606966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15187446.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 2156606966 is about 46439.2825741311. The cubic root of 2156606966 is about 1291.9836009478.

The spelling of 2156606966 in words is "two billion, one hundred fifty-six million, six hundred six thousand, nine hundred sixty-six".