99996379661 has 2 divisors, whose sum is σ = 99996379662. Its totient is φ = 99996379660.

The previous prime is 99996379627. The next prime is 99996379673. The reversal of 99996379661 is 16697369999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97847593636 + 2148786025 = 312806^2 + 46355^2 .

It is a cyclic number.

It is not a de Polignac number, because 99996379661 - 2²² = 99992185357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99996379621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49998189830 + 49998189831.

It is an arithmetic number, because the mean of its divisors is an integer number (49998189831).

Almost surely, 2^99996379661 is an apocalyptic number.

It is an amenable number.

99996379661 is a deficient number, since it is larger than the sum of its proper divisors (1).

99996379661 is an equidigital number, since it uses as much as digits as its factorization.

99996379661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 267846264, while the sum is 74.

The spelling of 99996379661 in words is "ninety-nine billion, nine hundred ninety-six million, three hundred seventy-nine thousand, six hundred sixty-one".