74010661 has 2 divisors, whose sum is σ = 74010662. Its totient is φ = 74010660.

The previous prime is 74010659. The next prime is 74010667. The reversal of 74010661 is 16601047.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56160036 + 17850625 = 7494^2 + 4225^2 .

It is a cyclic number.

It is not a de Polignac number, because 74010661 - 2¹ = 74010659 is a prime.

Together with 74010659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74010667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37005330 + 37005331.

It is an arithmetic number, because the mean of its divisors is an integer number (37005331).

Almost surely, 2^74010661 is an apocalyptic number.

It is an amenable number.

74010661 is a deficient number, since it is larger than the sum of its proper divisors (1).

74010661 is an equidigital number, since it uses as much as digits as its factorization.

74010661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 74010661 is about 8602.9449027644. The cubic root of 74010661 is about 419.8538058834.

The spelling of 74010661 in words is "seventy-four million, ten thousand, six hundred sixty-one".