7420699661 has 2 divisors, whose sum is σ = 7420699662. Its totient is φ = 7420699660.

The previous prime is 7420699607. The next prime is 7420699703. The reversal of 7420699661 is 1669960247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6824412100 + 596287561 = 82610^2 + 24419^2 .

It is an emirp because it is prime and its reverse (1669960247) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7420699661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7420699061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3710349830 + 3710349831.

It is an arithmetic number, because the mean of its divisors is an integer number (3710349831).

Almost surely, 2^7420699661 is an apocalyptic number.

It is an amenable number.

7420699661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7420699661 is an equidigital number, since it uses as much as digits as its factorization.

7420699661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 7420699661 is about 86143.4829862364. The cubic root of 7420699661 is about 1950.5104656149.

The spelling of 7420699661 in words is "seven billion, four hundred twenty million, six hundred ninety-nine thousand, six hundred sixty-one".