9967966 has 4 divisors (see below), whose sum is σ = 14951952. Its totient is φ = 4983982.

The previous prime is 9967891. The next prime is 9967987. The reversal of 9967966 is 6697699.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2491990 + ... + 2491993.

It is an arithmetic number, because the mean of its divisors is an integer number (3737988).

Almost surely, 2^9967966 is an apocalyptic number.

9967966 is a deficient number, since it is larger than the sum of its proper divisors (4983986).

9967966 is a wasteful number, since it uses less digits than its factorization.

9967966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4983985.

The product of its digits is 1102248, while the sum is 52.

The square root of 9967966 is about 3157.2085772087. The cubic root of 9967966 is about 215.2131723809.

It can be divided in two parts, 996 and 7966, that multiplied together give a triangular number (7934136 = T₃₉₈₃).

The spelling of 9967966 in words is "nine million, nine hundred sixty-seven thousand, nine hundred sixty-six".