9978567166 has 8 divisors (see below), whose sum is σ = 14972139000. Its totient is φ = 4987854168.

The previous prime is 9978567161. The next prime is 9978567169. The reversal of 9978567166 is 6617658799.

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

It is a junction number, because it is equal to n+sod(n) for n = 9978567098 and 9978567107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978567161) 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 in 3 ways as a sum of consecutive naturals, for example, 705961 + ... + 719956.

It is an arithmetic number, because the mean of its divisors is an integer number (1871517375).

Almost surely, 2^9978567166 is an apocalyptic number.

9978567166 is a deficient number, since it is larger than the sum of its proper divisors (4993571834).

9978567166 is a wasteful number, since it uses less digits than its factorization.

9978567166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429418.

The product of its digits is 34292160, while the sum is 64.

The square root of 9978567166 is about 99892.7783475863. The cubic root of 9978567166 is about 2152.8944010461.

The spelling of 9978567166 in words is "nine billion, nine hundred seventy-eight million, five hundred sixty-seven thousand, one hundred sixty-six".