71003660 has 72 divisors (see below), whose sum is σ = 184586976. Its totient is φ = 22464000.

The previous prime is 71003659. The next prime is 71003683. The reversal of 71003660 is 6630017.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 22160 + ... + 25160.

It is an arithmetic number, because the mean of its divisors is an integer number (2563708).

Almost surely, 2^71003660 is an apocalyptic number.

71003660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71003660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92293488).

71003660 is an abundant number, since it is smaller than the sum of its proper divisors (113583316).

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

71003660 is a wasteful number, since it uses less digits than its factorization.

71003660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043 (or 3028 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 71003660 is about 8426.3669514210. The cubic root of 71003660 is about 414.0888900280.

Adding to 71003660 its reverse (6630017), we get a palindrome (77633677).

The spelling of 71003660 in words is "seventy-one million, three thousand, six hundred sixty".