74117665 has 4 divisors (see below), whose sum is σ = 88941204. Its totient is φ = 59294128.

The previous prime is 74117663. The next prime is 74117699. The reversal of 74117665 is 56671147.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56671147 = 13 ⋅4359319.

It can be written as a sum of positive squares in 2 ways, for example, as 19298449 + 54819216 = 4393^2 + 7404^2 .

It is a cyclic number.

It is not a de Polignac number, because 74117665 - 2¹ = 74117663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74117663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7411762 + ... + 7411771.

It is an arithmetic number, because the mean of its divisors is an integer number (22235301).

Almost surely, 2^74117665 is an apocalyptic number.

It is an amenable number.

74117665 is a deficient number, since it is larger than the sum of its proper divisors (14823539).

74117665 is a wasteful number, since it uses less digits than its factorization.

74117665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14823538.

The product of its digits is 35280, while the sum is 37.

The square root of 74117665 is about 8609.1616897350. The cubic root of 74117665 is about 420.0560488314.

The spelling of 74117665 in words is "seventy-four million, one hundred seventeen thousand, six hundred sixty-five".