73966218 has 16 divisors (see below), whose sum is σ = 156634560. Its totient is φ = 23205056.

The previous prime is 73966213. The next prime is 73966223. The reversal of 73966218 is 81266937.

It is a happy number.

73966218 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (73966213) and next prime (73966223).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 73966218.

It is not an unprimeable number, because it can be changed into a prime (73966213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362478 + ... + 362681.

It is an arithmetic number, because the mean of its divisors is an integer number (9789660).

Almost surely, 2^73966218 is an apocalyptic number.

73966218 is an abundant number, since it is smaller than the sum of its proper divisors (82668342).

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

73966218 is a wasteful number, since it uses less digits than its factorization.

73966218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725181.

The product of its digits is 108864, while the sum is 42.

The square root of 73966218 is about 8600.3615040299. The cubic root of 73966218 is about 419.7697490792.

The spelling of 73966218 in words is "seventy-three million, nine hundred sixty-six thousand, two hundred eighteen".