9967320687 has 8 divisors (see below), whose sum is σ = 13867576704. Its totient is φ = 6355972568.

The previous prime is 9967320679. The next prime is 9967320689. The reversal of 9967320687 is 7860237699.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9967320687 - 2³ = 9967320679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9967320689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72226893 + ... + 72227030.

It is an arithmetic number, because the mean of its divisors is an integer number (1733447088).

Almost surely, 2^9967320687 is an apocalyptic number.

9967320687 is a deficient number, since it is larger than the sum of its proper divisors (3900256017).

9967320687 is a wasteful number, since it uses less digits than its factorization.

9967320687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144453949.

The product of its (nonzero) digits is 6858432, while the sum is 57.

The square root of 9967320687 is about 99836.4697242446. The cubic root of 9967320687 is about 2152.0852807485.

The spelling of 9967320687 in words is "nine billion, nine hundred sixty-seven million, three hundred twenty thousand, six hundred eighty-seven".