99664779194 has 8 divisors (see below), whose sum is σ = 149658094260. Its totient is φ = 49778747776.

The previous prime is 99664779163. The next prime is 99664779211. The reversal of 99664779194 is 49197746699.

It can be written as a sum of positive squares in 2 ways, for example, as 74127141169 + 25537638025 = 272263^2 + 159805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26818589 + ... + 26822304.

Almost surely, 2^99664779194 is an apocalyptic number.

99664779194 is a deficient number, since it is larger than the sum of its proper divisors (49993315066).

99664779194 is a wasteful number, since it uses less digits than its factorization.

99664779194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53641824.

The product of its digits is 185177664, while the sum is 71.

The spelling of 99664779194 in words is "ninety-nine billion, six hundred sixty-four million, seven hundred seventy-nine thousand, one hundred ninety-four".