79354062661 has 2 divisors, whose sum is σ = 79354062662. Its totient is φ = 79354062660.

The previous prime is 79354062589. The next prime is 79354062673. The reversal of 79354062661 is 16626045397.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40969808100 + 38384254561 = 202410^2 + 195919^2 .

It is a cyclic number.

It is not a de Polignac number, because 79354062661 - 2⁹ = 79354062149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79354062461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39677031330 + 39677031331.

It is an arithmetic number, because the mean of its divisors is an integer number (39677031331).

Almost surely, 2^79354062661 is an apocalyptic number.

It is an amenable number.

79354062661 is a deficient number, since it is larger than the sum of its proper divisors (1).

79354062661 is an equidigital number, since it uses as much as digits as its factorization.

79354062661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 79354062661 in words is "seventy-nine billion, three hundred fifty-four million, sixty-two thousand, six hundred sixty-one".