73666361 has 2 divisors, whose sum is σ = 73666362. Its totient is φ = 73666360.

The previous prime is 73666357. The next prime is 73666387. The reversal of 73666361 is 16366637.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68376361 + 5290000 = 8269^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 73666361 - 2² = 73666357 is a prime.

It is not a weakly prime, because it can be changed into another prime (73666301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36833180 + 36833181.

It is an arithmetic number, because the mean of its divisors is an integer number (36833181).

Almost surely, 2^73666361 is an apocalyptic number.

It is an amenable number.

73666361 is a deficient number, since it is larger than the sum of its proper divisors (1).

73666361 is an equidigital number, since it uses as much as digits as its factorization.

73666361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 38.

The square root of 73666361 is about 8582.9109863729. The cubic root of 73666361 is about 419.2017358358.

It can be divided in two parts, 7366636 and 1, that added together give a palindrome (7366637).

The spelling of 73666361 in words is "seventy-three million, six hundred sixty-six thousand, three hundred sixty-one".