74506661 has 2 divisors, whose sum is σ = 74506662. Its totient is φ = 74506660.

The previous prime is 74506639. The next prime is 74506669. The reversal of 74506661 is 16660547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48302500 + 26204161 = 6950^2 + 5119^2 .

It is a cyclic number.

It is not a de Polignac number, because 74506661 - 2¹⁰ = 74505637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74506669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37253330 + 37253331.

It is an arithmetic number, because the mean of its divisors is an integer number (37253331).

Almost surely, 2^74506661 is an apocalyptic number.

It is an amenable number.

74506661 is a deficient number, since it is larger than the sum of its proper divisors (1).

74506661 is an equidigital number, since it uses as much as digits as its factorization.

74506661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 74506661 is about 8631.7241035612. The cubic root of 74506661 is about 420.7896350492.

The spelling of 74506661 in words is "seventy-four million, five hundred six thousand, six hundred sixty-one".