71700660 has 144 divisors (see below), whose sum is σ = 234118080. Its totient is φ = 18216000.

The previous prime is 71700649. The next prime is 71700667. The reversal of 71700660 is 6600717.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71700667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 285535 + ... + 285785.

It is an arithmetic number, because the mean of its divisors is an integer number (1625820).

Almost surely, 2^71700660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71700660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117059040).

71700660 is an abundant number, since it is smaller than the sum of its proper divisors (162417420).

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

71700660 is a wasteful number, since it uses less digits than its factorization.

71700660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 71700660 is about 8467.6242240666. The cubic root of 71700660 is about 415.4394338859.

The spelling of 71700660 in words is "seventy-one million, seven hundred thousand, six hundred sixty".