966643638 has 8 divisors (see below), whose sum is σ = 1933287288. Its totient is φ = 322214544.

The previous prime is 966643607. The next prime is 966643651. The reversal of 966643638 is 836346669.

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

966643638 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80553631 + ... + 80553642.

It is an arithmetic number, because the mean of its divisors is an integer number (241660911).

Almost surely, 2^966643638 is an apocalyptic number.

966643638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

966643638 is a wasteful number, since it uses less digits than its factorization.

966643638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161107278.

The product of its digits is 3359232, while the sum is 51.

The square root of 966643638 is about 31090.8931682575. The cubic root of 966643638 is about 988.7552420311.

The spelling of 966643638 in words is "nine hundred sixty-six million, six hundred forty-three thousand, six hundred thirty-eight".