74818661 has 2 divisors, whose sum is σ = 74818662. Its totient is φ = 74818660.

The previous prime is 74818633. The next prime is 74818673. The reversal of 74818661 is 16681847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67338436 + 7480225 = 8206^2 + 2735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74818661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74818631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37409330 + 37409331.

It is an arithmetic number, because the mean of its divisors is an integer number (37409331).

Almost surely, 2^74818661 is an apocalyptic number.

It is an amenable number.

74818661 is a deficient number, since it is larger than the sum of its proper divisors (1).

74818661 is an equidigital number, since it uses as much as digits as its factorization.

74818661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 74818661 is about 8649.7780896391. The cubic root of 74818661 is about 421.3761756066.

The spelling of 74818661 in words is "seventy-four million, eight hundred eighteen thousand, six hundred sixty-one".