74661787 has 4 divisors (see below), whose sum is σ = 74800336. Its totient is φ = 74523240.

The previous prime is 74661781. The next prime is 74661791. The reversal of 74661787 is 78716647.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74661787 - 2¹⁵ = 74629019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74661781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68463 + ... + 69544.

It is an arithmetic number, because the mean of its divisors is an integer number (18700084).

Almost surely, 2^74661787 is an apocalyptic number.

74661787 is a deficient number, since it is larger than the sum of its proper divisors (138549).

74661787 is a wasteful number, since it uses less digits than its factorization.

74661787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138548.

The product of its digits is 395136, while the sum is 46.

The square root of 74661787 is about 8640.7052374213. The cubic root of 74661787 is about 421.0814665102.

The spelling of 74661787 in words is "seventy-four million, six hundred sixty-one thousand, seven hundred eighty-seven".