774450661 has 2 divisors, whose sum is σ = 774450662. Its totient is φ = 774450660.

The previous prime is 774450637. The next prime is 774450671. The reversal of 774450661 is 166054477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 749390625 + 25060036 = 27375^2 + 5006^2 .

It is a cyclic number.

It is not a de Polignac number, because 774450661 - 2⁷ = 774450533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (774450671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387225330 + 387225331.

It is an arithmetic number, because the mean of its divisors is an integer number (387225331).

Almost surely, 2^774450661 is an apocalyptic number.

It is an amenable number.

774450661 is a deficient number, since it is larger than the sum of its proper divisors (1).

774450661 is an equidigital number, since it uses as much as digits as its factorization.

774450661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 774450661 is about 27828.9536454391. The cubic root of 774450661 is about 918.3281945717.

The spelling of 774450661 in words is "seven hundred seventy-four million, four hundred fifty thousand, six hundred sixty-one".