74767661 has 4 divisors (see below), whose sum is σ = 75180924. Its totient is φ = 74354400.

The previous prime is 74767657. The next prime is 74767673. The reversal of 74767661 is 16676747.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34445161 + 40322500 = 5869^2 + 6350^2 .

It is a cyclic number.

It is not a de Polignac number, because 74767661 - 2² = 74767657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74767631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206360 + ... + 206721.

It is an arithmetic number, because the mean of its divisors is an integer number (18795231).

Almost surely, 2^74767661 is an apocalyptic number.

It is an amenable number.

74767661 is a deficient number, since it is larger than the sum of its proper divisors (413263).

74767661 is a wasteful number, since it uses less digits than its factorization.

74767661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413262.

The product of its digits is 296352, while the sum is 44.

The square root of 74767661 is about 8646.8295345751. The cubic root of 74767661 is about 421.2804104172.

The spelling of 74767661 in words is "seventy-four million, seven hundred sixty-seven thousand, six hundred sixty-one".