9966351 has 4 divisors (see below), whose sum is σ = 13288472. Its totient is φ = 6644232.

The previous prime is 9966347. The next prime is 9966367. The reversal of 9966351 is 1536699.

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

It is not a de Polignac number, because 9966351 - 2² = 9966347 is a prime.

It is a Duffinian number.

9966351 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1661056 + ... + 1661061.

It is an arithmetic number, because the mean of its divisors is an integer number (3322118).

Almost surely, 2^9966351 is an apocalyptic number.

9966351 is a deficient number, since it is larger than the sum of its proper divisors (3322121).

9966351 is a wasteful number, since it uses less digits than its factorization.

9966351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322120.

The product of its digits is 43740, while the sum is 39.

The square root of 9966351 is about 3156.9528029415. The cubic root of 9966351 is about 215.2015488780.

The spelling of 9966351 in words is "nine million, nine hundred sixty-six thousand, three hundred fifty-one".