74965661 has 2 divisors, whose sum is σ = 74965662. Its totient is φ = 74965660.

The previous prime is 74965643. The next prime is 74965711. The reversal of 74965661 is 16656947.

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., 68790436 + 6175225 = 8294^2 + 2485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74965661 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 (74965601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37482830 + 37482831.

It is an arithmetic number, because the mean of its divisors is an integer number (37482831).

Almost surely, 2^74965661 is an apocalyptic number.

It is an amenable number.

74965661 is a deficient number, since it is larger than the sum of its proper divisors (1).

74965661 is an equidigital number, since it uses as much as digits as its factorization.

74965661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 74965661 is about 8658.2712477723. The cubic root of 74965661 is about 421.6519614161.

The spelling of 74965661 in words is "seventy-four million, nine hundred sixty-five thousand, six hundred sixty-one".