71664500 has 24 divisors (see below), whose sum is σ = 156516360. Its totient is φ = 28665600.

The previous prime is 71664499. The next prime is 71664511. The reversal of 71664500 is 546617.

It can be written as a sum of positive squares in 4 ways, for example, as 126736 + 71537764 = 356^2 + 8458^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 71165 + ... + 72164.

It is an arithmetic number, because the mean of its divisors is an integer number (6521515).

Almost surely, 2^71664500 is an apocalyptic number.

It is an amenable number.

71664500 is an abundant number, since it is smaller than the sum of its proper divisors (84851860).

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

71664500 is a wasteful number, since it uses less digits than its factorization.

71664500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143348 (or 143336 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 71664500 is about 8465.4887632079. The cubic root of 71664500 is about 415.3695841524.

The spelling of 71664500 in words is "seventy-one million, six hundred sixty-four thousand, five hundred".