9977329668 has 48 divisors (see below), whose sum is σ = 23354999360. Its totient is φ = 3315147264.

The previous prime is 9977329667. The next prime is 9977329669. The reversal of 9977329668 is 8669237799.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9977329667) and next prime (9977329669).

It is a junction number, because it is equal to n+sod(n) for n = 9977329599 and 9977329608.

It is not an unprimeable number, because it can be changed into a prime (9977329667) 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, 9658080 + ... + 9659112.

Almost surely, 2^9977329668 is an apocalyptic number.

It is an amenable number.

9977329668 is an abundant number, since it is smaller than the sum of its proper divisors (13377669692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9977329668 is a wasteful number, since it uses less digits than its factorization.

9977329668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836 (or 2834 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 66.

The square root of 9977329668 is about 99886.5840240820. The cubic root of 9977329668 is about 2152.8053998694.

The spelling of 9977329668 in words is "nine billion, nine hundred seventy-seven million, three hundred twenty-nine thousand, six hundred sixty-eight".