73666881 has 32 divisors (see below), whose sum is σ = 113418240. Its totient is φ = 47206800.

The previous prime is 73666867. The next prime is 73666919. The reversal of 73666881 is 18866637.

It is not a de Polignac number, because 73666881 - 2⁷ = 73666753 is a prime.

It is a super-2 number, since 2×73666881² = 10853618712536322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (73666811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236716 + ... + 237026.

It is an arithmetic number, because the mean of its divisors is an integer number (3544320).

Almost surely, 2^73666881 is an apocalyptic number.

It is an amenable number.

73666881 is a deficient number, since it is larger than the sum of its proper divisors (39751359).

73666881 is a wasteful number, since it uses less digits than its factorization.

73666881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 628 counting only the distinct ones).

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

The square root of 73666881 is about 8582.9412790721. The cubic root of 73666881 is about 419.2027221946.

It can be divided in two parts, 73666 and 881, that added together give a palindrome (74547).

The spelling of 73666881 in words is "seventy-three million, six hundred sixty-six thousand, eight hundred eighty-one".