99478120669 has 8 divisors (see below), whose sum is σ = 107317130040. Its totient is φ = 91859928576.

The previous prime is 99478120649. The next prime is 99478120711. The reversal of 99478120669 is 96602187499.

It can be written as a sum of positive squares in 4 ways, for example, as 68796044100 + 30682076569 = 262290^2 + 175163^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 99478120669 - 2⁷ = 99478120541 is a prime.

It is a super-2 number, since 2×99478120669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99478120649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55203384 + ... + 55205185.

It is an arithmetic number, because the mean of its divisors is an integer number (13414641255).

Almost surely, 2^99478120669 is an apocalyptic number.

It is an amenable number.

99478120669 is a deficient number, since it is larger than the sum of its proper divisors (7839009371).

99478120669 is a wasteful number, since it uses less digits than its factorization.

99478120669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110408639.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 99478120669 in words is "ninety-nine billion, four hundred seventy-eight million, one hundred twenty thousand, six hundred sixty-nine".