73681866 has 32 divisors (see below), whose sum is σ = 169387200. Its totient is φ = 23713200.

The previous prime is 73681847. The next prime is 73681871. The reversal of 73681866 is 66818637.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21960 + ... + 25091.

It is an arithmetic number, because the mean of its divisors is an integer number (5293350).

Almost surely, 2^73681866 is an apocalyptic number.

73681866 is an abundant number, since it is smaller than the sum of its proper divisors (95705334).

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

73681866 is a wasteful number, since it uses less digits than its factorization.

73681866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47091 (or 47085 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 73681866 is about 8583.8141871781. The cubic root of 73681866 is about 419.2311444056.

It can be divided in two parts, 73681 and 866, that added together give a palindrome (74547).

The spelling of 73681866 in words is "seventy-three million, six hundred eighty-one thousand, eight hundred sixty-six".