73751665 has 16 divisors (see below), whose sum is σ = 97530048. Its totient is φ = 53194176.

The previous prime is 73751651. The next prime is 73751683. The reversal of 73751665 is 56615737.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 73751665 - 2⁵ = 73751633 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 10399 + ... + 15988.

It is an arithmetic number, because the mean of its divisors is an integer number (6095628).

Almost surely, 2^73751665 is an apocalyptic number.

It is an amenable number.

73751665 is a deficient number, since it is larger than the sum of its proper divisors (23778383).

73751665 is a wasteful number, since it uses less digits than its factorization.

73751665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26448.

The product of its digits is 132300, while the sum is 40.

The square root of 73751665 is about 8587.8789581596. The cubic root of 73751665 is about 419.3634821668.

The spelling of 73751665 in words is "seventy-three million, seven hundred fifty-one thousand, six hundred sixty-five".