9977663321 has 2 divisors, whose sum is σ = 9977663322. Its totient is φ = 9977663320.

The previous prime is 9977663291. The next prime is 9977663351. The reversal of 9977663321 is 1233667799.

It is a balanced prime because it is at equal distance from previous prime (9977663291) and next prime (9977663351).

It can be written as a sum of positive squares in only one way, i.e., 8157702400 + 1819960921 = 90320^2 + 42661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9977663321 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (9977663351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988831660 + 4988831661.

It is an arithmetic number, because the mean of its divisors is an integer number (4988831661).

Almost surely, 2^9977663321 is an apocalyptic number.

It is an amenable number.

9977663321 is a deficient number, since it is larger than the sum of its proper divisors (1).

9977663321 is an equidigital number, since it uses as much as digits as its factorization.

9977663321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 53.

The square root of 9977663321 is about 99888.2541693467. The cubic root of 9977663321 is about 2152.8293970042.

The spelling of 9977663321 in words is "nine billion, nine hundred seventy-seven million, six hundred sixty-three thousand, three hundred twenty-one".