73445665 has 16 divisors (see below), whose sum is σ = 92238336. Its totient is φ = 56073600.

The previous prime is 73445663. The next prime is 73445683. The reversal of 73445665 is 56654437.

It is not a de Polignac number, because 73445665 - 2¹ = 73445663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73445663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8070 + ... + 14560.

It is an arithmetic number, because the mean of its divisors is an integer number (5764896).

Almost surely, 2^73445665 is an apocalyptic number.

It is an amenable number.

73445665 is a deficient number, since it is larger than the sum of its proper divisors (18792671).

73445665 is a wasteful number, since it uses less digits than its factorization.

73445665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600.

The product of its digits is 302400, while the sum is 40.

The square root of 73445665 is about 8570.0446323225. The cubic root of 73445665 is about 418.7826902526.

The spelling of 73445665 in words is "seventy-three million, four hundred forty-five thousand, six hundred sixty-five".