74477777 has 16 divisors (see below), whose sum is σ = 85821120. Its totient is φ = 63921600.

The previous prime is 74477759. The next prime is 74477789. The reversal of 74477777 is 77777447.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 74477777 - 2¹² = 74473681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74477737) 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 15 ways as a sum of consecutive naturals, for example, 95963 + ... + 96735.

It is an arithmetic number, because the mean of its divisors is an integer number (5363820).

Almost surely, 2^74477777 is an apocalyptic number.

It is an amenable number.

74477777 is a deficient number, since it is larger than the sum of its proper divisors (11343343).

74477777 is a wasteful number, since it uses less digits than its factorization.

74477777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264.

The product of its digits is 1882384, while the sum is 50.

The square root of 74477777 is about 8630.0508109744. The cubic root of 74477777 is about 420.7352521766.

The spelling of 74477777 in words is "seventy-four million, four hundred seventy-seven thousand, seven hundred seventy-seven".