74066661 has 6 divisors (see below), whose sum is σ = 106985190. Its totient is φ = 49377768.

The previous prime is 74066659. The next prime is 74066669. The reversal of 74066661 is 16666047.

It can be written as a sum of positive squares in only one way, i.e., 37088100 + 36978561 = 6090^2 + 6081^2 .

It is not a de Polignac number, because 74066661 - 2¹ = 74066659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74066669) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 4114806 + ... + 4114823.

It is an arithmetic number, because the mean of its divisors is an integer number (17830865).

Almost surely, 2^74066661 is an apocalyptic number.

It is an amenable number.

74066661 is a deficient number, since it is larger than the sum of its proper divisors (32918529).

74066661 is a wasteful number, since it uses less digits than its factorization.

74066661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8229635 (or 8229632 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 74066661 is about 8606.1989867769. The cubic root of 74066661 is about 419.9596729988.

The spelling of 74066661 in words is "seventy-four million, sixty-six thousand, six hundred sixty-one".