784596661 has 2 divisors, whose sum is σ = 784596662. Its totient is φ = 784596660.

The previous prime is 784596643. The next prime is 784596689. The reversal of 784596661 is 166695487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522351025 + 262245636 = 22855^2 + 16194^2 .

It is a cyclic number.

It is not a de Polignac number, because 784596661 - 2⁹ = 784596149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 784596599 and 784596608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (784596961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392298330 + 392298331.

It is an arithmetic number, because the mean of its divisors is an integer number (392298331).

Almost surely, 2^784596661 is an apocalyptic number.

It is an amenable number.

784596661 is a deficient number, since it is larger than the sum of its proper divisors (1).

784596661 is an equidigital number, since it uses as much as digits as its factorization.

784596661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 52.

The square root of 784596661 is about 28010.6526343104. The cubic root of 784596661 is about 922.3211164029.

The spelling of 784596661 in words is "seven hundred eighty-four million, five hundred ninety-six thousand, six hundred sixty-one".