74775865 has 4 divisors (see below), whose sum is σ = 89731044. Its totient is φ = 59820688.

The previous prime is 74775847. The next prime is 74775901. The reversal of 74775865 is 56857747.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56857747 = 19 ⋅2992513.

It can be written as a sum of positive squares in 2 ways, for example, as 18870336 + 55905529 = 4344^2 + 7477^2 .

It is a cyclic number.

It is not a de Polignac number, because 74775865 - 2⁹ = 74775353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7477582 + ... + 7477591.

It is an arithmetic number, because the mean of its divisors is an integer number (22432761).

Almost surely, 2^74775865 is an apocalyptic number.

It is an amenable number.

74775865 is a deficient number, since it is larger than the sum of its proper divisors (14955179).

74775865 is a wasteful number, since it uses less digits than its factorization.

74775865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14955178.

The product of its digits is 1646400, while the sum is 49.

The square root of 74775865 is about 8647.3039150940. The cubic root of 74775865 is about 421.2958184070.

The spelling of 74775865 in words is "seventy-four million, seven hundred seventy-five thousand, eight hundred sixty-five".