74071665 has 20 divisors (see below), whose sum is σ = 132781044. Its totient is φ = 39504672.

The previous prime is 74071651. The next prime is 74071667. The reversal of 74071665 is 56617047.

It can be written as a sum of positive squares in 2 ways, for example, as 28387584 + 45684081 = 5328^2 + 6759^2 .

It is not a de Polignac number, because 74071665 - 2¹² = 74067569 is a prime.

It is a super-2 number, since 2×74071665² = 10973223111744450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74071667) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 91042 + ... + 91851.

Almost surely, 2^74071665 is an apocalyptic number.

It is an amenable number.

74071665 is a deficient number, since it is larger than the sum of its proper divisors (58709379).

74071665 is a wasteful number, since it uses less digits than its factorization.

74071665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182910 (or 182901 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 74071665 is about 8606.4897025442. The cubic root of 74071665 is about 419.9691303842.

The spelling of 74071665 in words is "seventy-four million, seventy-one thousand, six hundred sixty-five".