9662662661 has 2 divisors, whose sum is σ = 9662662662. Its totient is φ = 9662662660.

The previous prime is 9662662621. The next prime is 9662662673. The reversal of 9662662661 is 1662662669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6261556900 + 3401105761 = 79130^2 + 58319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9662662661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9662662601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4831331330 + 4831331331.

It is an arithmetic number, because the mean of its divisors is an integer number (4831331331).

Almost surely, 2^9662662661 is an apocalyptic number.

It is an amenable number.

9662662661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9662662661 is an equidigital number, since it uses as much as digits as its factorization.

9662662661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 50.

The square root of 9662662661 is about 98298.8436401975. The cubic root of 9662662661 is about 2129.9313503997.

The spelling of 9662662661 in words is "nine billion, six hundred sixty-two million, six hundred sixty-two thousand, six hundred sixty-one".