2152166656 has 18 divisors (see below), whose sum is σ = 4295926922. Its totient is φ = 1076083200.

The previous prime is 2152166633. The next prime is 2152166657. The reversal of 2152166656 is 6566612512.

It can be written as a sum of positive squares in only one way, i.e., 1294848256 + 857318400 = 35984^2 + 29280^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152166657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4203195 + ... + 4203706.

Almost surely, 2^2152166656 is an apocalyptic number.

It is an amenable number.

2152166656 is a deficient number, since it is larger than the sum of its proper divisors (2143760266).

2152166656 is an frugal number, since it uses more digits than its factorization.

2152166656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8406917 (or 8406903 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 2152166656 is about 46391.4502467858. The cubic root of 2152166656 is about 1291.0962889900.

The spelling of 2152166656 in words is "two billion, one hundred fifty-two million, one hundred sixty-six thousand, six hundred fifty-six".