74764661 has 2 divisors, whose sum is σ = 74764662. Its totient is φ = 74764660.

The previous prime is 74764643. The next prime is 74764663. The reversal of 74764661 is 16646747.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52852900 + 21911761 = 7270^2 + 4681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74764661 is a prime.

Together with 74764663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74764663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37382330 + 37382331.

It is an arithmetic number, because the mean of its divisors is an integer number (37382331).

Almost surely, 2^74764661 is an apocalyptic number.

It is an amenable number.

74764661 is a deficient number, since it is larger than the sum of its proper divisors (1).

74764661 is an equidigital number, since it uses as much as digits as its factorization.

74764661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 41.

The square root of 74764661 is about 8646.6560588473. The cubic root of 74764661 is about 421.2747758147.

The spelling of 74764661 in words is "seventy-four million, seven hundred sixty-four thousand, six hundred sixty-one".