551106010661 has 2 divisors, whose sum is σ = 551106010662. Its totient is φ = 551106010660.

The previous prime is 551106010639. The next prime is 551106010669. The reversal of 551106010661 is 166010601155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377525453761 + 173580556900 = 614431^2 + 416630^2 .

It is a cyclic number.

It is not a de Polignac number, because 551106010661 - 2⁶ = 551106010597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551106010669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275553005330 + 275553005331.

It is an arithmetic number, because the mean of its divisors is an integer number (275553005331).

Almost surely, 2^551106010661 is an apocalyptic number.

It is an amenable number.

551106010661 is a deficient number, since it is larger than the sum of its proper divisors (1).

551106010661 is an equidigital number, since it uses as much as digits as its factorization.

551106010661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 551106010661 in words is "five hundred fifty-one billion, one hundred six million, ten thousand, six hundred sixty-one".