774336241264661 has 2 divisors, whose sum is σ = 774336241264662. Its totient is φ = 774336241264660.

The previous prime is 774336241264627. The next prime is 774336241264721. The reversal of 774336241264661 is 166462142633477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605390966833636 + 168945274431025 = 24604694^2 + 12997895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-774336241264661 is a prime.

It is a super-2 number, since 2×774336241264661² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 774336241264594 and 774336241264603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (774336241264601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387168120632330 + 387168120632331.

It is an arithmetic number, because the mean of its divisors is an integer number (387168120632331).

Almost surely, 2^{774336241264661} is an apocalyptic number.

It is an amenable number.

774336241264661 is a deficient number, since it is larger than the sum of its proper divisors (1).

774336241264661 is an equidigital number, since it uses as much as digits as its factorization.

774336241264661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 146313216, while the sum is 62.

The spelling of 774336241264661 in words is "seven hundred seventy-four trillion, three hundred thirty-six billion, two hundred forty-one million, two hundred sixty-four thousand, six hundred sixty-one".