8663339961 has 16 divisors (see below), whose sum is σ = 13589553600. Its totient is φ = 5435820864.

The previous prime is 8663339957. The next prime is 8663339963. The reversal of 8663339961 is 1699333668.

It is a happy number.

It is not a de Polignac number, because 8663339961 - 2² = 8663339957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8663339898 and 8663339907.

It is not an unprimeable number, because it can be changed into a prime (8663339963) 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, 9436731 + ... + 9437648.

It is an arithmetic number, because the mean of its divisors is an integer number (849347100).

Almost surely, 2^8663339961 is an apocalyptic number.

It is an amenable number.

8663339961 is a deficient number, since it is larger than the sum of its proper divisors (4926213639).

8663339961 is a wasteful number, since it uses less digits than its factorization.

8663339961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18874405 (or 18874399 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 54.

The square root of 8663339961 is about 93077.0646346349. The cubic root of 8663339961 is about 2053.8171956246.

The spelling of 8663339961 in words is "eight billion, six hundred sixty-three million, three hundred thirty-nine thousand, nine hundred sixty-one".