71669156 has 12 divisors (see below), whose sum is σ = 135068892. Its totient is φ = 33078048.

The previous prime is 71669131. The next prime is 71669167. The reversal of 71669156 is 65196617.

It can be written as a sum of positive squares in 2 ways, for example, as 3936256 + 67732900 = 1984^2 + 8230^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689075 + ... + 689178.

It is an arithmetic number, because the mean of its divisors is an integer number (11255741).

Almost surely, 2^71669156 is an apocalyptic number.

It is an amenable number.

71669156 is a deficient number, since it is larger than the sum of its proper divisors (63399736).

71669156 is a wasteful number, since it uses less digits than its factorization.

71669156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378270 (or 1378268 counting only the distinct ones).

The product of its digits is 68040, while the sum is 41.

The square root of 71669156 is about 8465.7637576299. The cubic root of 71669156 is about 415.3785793960.

The spelling of 71669156 in words is "seventy-one million, six hundred sixty-nine thousand, one hundred fifty-six".