71982660 has 24 divisors (see below), whose sum is σ = 201551616. Its totient is φ = 19195360.

The previous prime is 71982653. The next prime is 71982661. The reversal of 71982660 is 6628917.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (71982661) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 599796 + ... + 599915.

It is an arithmetic number, because the mean of its divisors is an integer number (8397984).

Almost surely, 2^71982660 is an apocalyptic number.

It is an amenable number.

71982660 is an abundant number, since it is smaller than the sum of its proper divisors (129568956).

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

71982660 is a wasteful number, since it uses less digits than its factorization.

71982660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199723 (or 1199721 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 71982660 is about 8484.2595434133. The cubic root of 71982660 is about 415.9833650276.

The spelling of 71982660 in words is "seventy-one million, nine hundred eighty-two thousand, six hundred sixty".