71146660 has 24 divisors (see below), whose sum is σ = 160901496. Its totient is φ = 26269440.

The previous prime is 71146637. The next prime is 71146667. The reversal of 71146660 is 6664117.

It can be written as a sum of positive squares in 4 ways, for example, as 1290496 + 69856164 = 1136^2 + 8358^2 .

It is not an unprimeable number, because it can be changed into a prime (71146667) 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 in 7 ways as a sum of consecutive naturals, for example, 136561 + ... + 137080.

It is an arithmetic number, because the mean of its divisors is an integer number (6704229).

Almost surely, 2^71146660 is an apocalyptic number.

It is an amenable number.

71146660 is an abundant number, since it is smaller than the sum of its proper divisors (89754836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71146660 is a wasteful number, since it uses less digits than its factorization.

71146660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273663 (or 273661 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 71146660 is about 8434.8479535792. The cubic root of 71146660 is about 414.3666926242.

The spelling of 71146660 in words is "seventy-one million, one hundred forty-six thousand, six hundred sixty".