966662391 has 8 divisors (see below), whose sum is σ = 1289056384. Its totient is φ = 644355000.

The previous prime is 966662387. The next prime is 966662401. The reversal of 966662391 is 193266669.

It is a happy number.

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

It is not a de Polignac number, because 966662391 - 2² = 966662387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 966662391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966662311) 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, 11766 + ... + 45516.

It is an arithmetic number, because the mean of its divisors is an integer number (161132048).

Almost surely, 2^966662391 is an apocalyptic number.

966662391 is a deficient number, since it is larger than the sum of its proper divisors (322393993).

966662391 is a wasteful number, since it uses less digits than its factorization.

966662391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43301.

The product of its digits is 629856, while the sum is 48.

The square root of 966662391 is about 31091.1947502826. The cubic root of 966662391 is about 988.7616359790.

The spelling of 966662391 in words is "nine hundred sixty-six million, six hundred sixty-two thousand, three hundred ninety-one".