73740665 has 4 divisors (see below), whose sum is σ = 88488804. Its totient is φ = 58992528.

The previous prime is 73740659. The next prime is 73740677. The reversal of 73740665 is 56604737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56604737 = 7 ⋅8086391.

It can be written as a sum of positive squares in 2 ways, for example, as 26020201 + 47720464 = 5101^2 + 6908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73740665 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7374062 + ... + 7374071.

It is an arithmetic number, because the mean of its divisors is an integer number (22122201).

Almost surely, 2^73740665 is an apocalyptic number.

It is an amenable number.

73740665 is a deficient number, since it is larger than the sum of its proper divisors (14748139).

73740665 is a wasteful number, since it uses less digits than its factorization.

73740665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14748138.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 73740665 is about 8587.2384967462. The cubic root of 73740665 is about 419.3426318910.

The spelling of 73740665 in words is "seventy-three million, seven hundred forty thousand, six hundred sixty-five".