8693542661 has 2 divisors, whose sum is σ = 8693542662. Its totient is φ = 8693542660.

The previous prime is 8693542621. The next prime is 8693542667. The reversal of 8693542661 is 1662453968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8506372900 + 187169761 = 92230^2 + 13681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8693542661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8693542667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4346771330 + 4346771331.

It is an arithmetic number, because the mean of its divisors is an integer number (4346771331).

Almost surely, 2^8693542661 is an apocalyptic number.

It is an amenable number.

8693542661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8693542661 is an equidigital number, since it uses as much as digits as its factorization.

8693542661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 50.

The square root of 8693542661 is about 93239.1691350797. The cubic root of 8693542661 is about 2056.2011444975.

The spelling of 8693542661 in words is "eight billion, six hundred ninety-three million, five hundred forty-two thousand, six hundred sixty-one".