74858661 has 20 divisors (see below), whose sum is σ = 114558444. Its totient is φ = 48686400.

The previous prime is 74858617. The next prime is 74858677. The reversal of 74858661 is 16685847.

It is a happy number.

74858661 is a `hidden beast` number, since 7 + 4 + 8 + 586 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28196100 + 46662561 = 5310^2 + 6831^2 .

It is not a de Polignac number, because 74858661 - 2¹⁰ = 74857637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74858611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7950 + ... + 14591.

Almost surely, 2^74858661 is an apocalyptic number.

It is an amenable number.

74858661 is a deficient number, since it is larger than the sum of its proper divisors (39699783).

74858661 is a wasteful number, since it uses less digits than its factorization.

74858661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22594 (or 22585 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 74858661 is about 8652.0899787277. The cubic root of 74858661 is about 421.4512551120.

The spelling of 74858661 in words is "seventy-four million, eight hundred fifty-eight thousand, six hundred sixty-one".