73866321 has 6 divisors (see below), whose sum is σ = 106695810. Its totient is φ = 49244208.

The previous prime is 73866313. The next prime is 73866323. The reversal of 73866321 is 12366837.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59120721 + 14745600 = 7689^2 + 3840^2 .

It is not a de Polignac number, because 73866321 - 2³ = 73866313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73866323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4103676 + ... + 4103693.

It is an arithmetic number, because the mean of its divisors is an integer number (17782635).

Almost surely, 2^73866321 is an apocalyptic number.

It is an amenable number.

73866321 is a deficient number, since it is larger than the sum of its proper divisors (32829489).

73866321 is a wasteful number, since it uses less digits than its factorization.

73866321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8207375 (or 8207372 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 73866321 is about 8594.5518207758. The cubic root of 73866321 is about 419.5806869543.

The spelling of 73866321 in words is "seventy-three million, eight hundred sixty-six thousand, three hundred twenty-one".