166127656 has 8 divisors (see below), whose sum is σ = 311489370. Its totient is φ = 83063824.

The previous prime is 166127653. The next prime is 166127677. The reversal of 166127656 is 656721661.

It can be written as a sum of positive squares in only one way, i.e., 164711556 + 1416100 = 12834^2 + 1190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (166127651) 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 as a sum of consecutive naturals, namely, 10382971 + ... + 10382986.

Almost surely, 2^166127656 is an apocalyptic number.

It is an amenable number.

166127656 is a deficient number, since it is larger than the sum of its proper divisors (145361714).

166127656 is a wasteful number, since it uses less digits than its factorization.

166127656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20765963 (or 20765959 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 166127656 is about 12889.0517882426. The cubic root of 166127656 is about 549.7273094502.

The spelling of 166127656 in words is "one hundred sixty-six million, one hundred twenty-seven thousand, six hundred fifty-six".