9978366101 has 16 divisors (see below), whose sum is σ = 10935388800. Its totient is φ = 9029737920.

The previous prime is 9978366077. The next prime is 9978366113. The reversal of 9978366101 is 1016638799.

It is a cyclic number.

It is not a de Polignac number, because 9978366101 - 2¹⁸ = 9978103957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9978366101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978366191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4507871 + ... + 4510083.

It is an arithmetic number, because the mean of its divisors is an integer number (683461800).

Almost surely, 2^9978366101 is an apocalyptic number.

It is an amenable number.

9978366101 is a deficient number, since it is larger than the sum of its proper divisors (957022699).

9978366101 is a wasteful number, since it uses less digits than its factorization.

9978366101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3916.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 9978366101 is about 99891.7719384334. The cubic root of 9978366101 is about 2152.8799408999.

The spelling of 9978366101 in words is "nine billion, nine hundred seventy-eight million, three hundred sixty-six thousand, one hundred one".