71866080 has 288 divisors, whose sum is σ = 288943200. Its totient is φ = 16035840.

The previous prime is 71866061. The next prime is 71866111. The reversal of 71866080 is 8066817.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 205746 + ... + 206094.

It is an arithmetic number, because the mean of its divisors is an integer number (1003275).

Almost surely, 2^71866080 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 71866080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144471600).

71866080 is an abundant number, since it is smaller than the sum of its proper divisors (217077120).

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

71866080 is a wasteful number, since it uses less digits than its factorization.

71866080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 71866080 is about 8477.3863896840. The cubic root of 71866080 is about 415.7586741340.

The spelling of 71866080 in words is "seventy-one million, eight hundred sixty-six thousand, eighty".