73665533 has 2 divisors, whose sum is σ = 73665534. Its totient is φ = 73665532.

The previous prime is 73665523. The next prime is 73665551. The reversal of 73665533 is 33556637.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62125924 + 11539609 = 7882^2 + 3397^2 .

It is a cyclic number.

It is not a de Polignac number, because 73665533 - 2⁶ = 73665469 is a prime.

It is a super-2 number, since 2×73665533² = 10853221504348178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73665523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36832766 + 36832767.

It is an arithmetic number, because the mean of its divisors is an integer number (36832767).

Almost surely, 2^73665533 is an apocalyptic number.

It is an amenable number.

73665533 is a deficient number, since it is larger than the sum of its proper divisors (1).

73665533 is an equidigital number, since it uses as much as digits as its factorization.

73665533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 38.

The square root of 73665533 is about 8582.8627508542. The cubic root of 73665533 is about 419.2001652396.

The spelling of 73665533 in words is "seventy-three million, six hundred sixty-five thousand, five hundred thirty-three".