71052066 has 40 divisors (see below), whose sum is σ = 160736400. Its totient is φ = 23456952.

The previous prime is 71052053. The next prime is 71052073. The reversal of 71052066 is 66025017.

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

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 15285 + ... + 19383.

It is an arithmetic number, because the mean of its divisors is an integer number (4018410).

Almost surely, 2^71052066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71052066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80368200).

71052066 is an abundant number, since it is smaller than the sum of its proper divisors (89684334).

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

71052066 is a wasteful number, since it uses less digits than its factorization.

71052066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4220 (or 4211 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 71052066 is about 8429.2387556647. The cubic root of 71052066 is about 414.1829689037.

The spelling of 71052066 in words is "seventy-one million, fifty-two thousand, sixty-six".