7839966 has 8 divisors (see below), whose sum is σ = 15679944. Its totient is φ = 2613320.

The previous prime is 7839961. The next prime is 7840013. The reversal of 7839966 is 6699387.

It is a happy number.

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

7839966 is an admirable number.

It is a super-2 number, since 2×7839966² = 122930133762312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7839961) 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, 653325 + ... + 653336.

It is an arithmetic number, because the mean of its divisors is an integer number (1959993).

Almost surely, 2^7839966 is an apocalyptic number.

7839966 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.

7839966 is a wasteful number, since it uses less digits than its factorization.

7839966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306666.

The product of its digits is 489888, while the sum is 48.

The square root of 7839966 is about 2799.9939285648. The cubic root of 7839966 is about 198.6573905002.

The spelling of 7839966 in words is "seven million, eight hundred thirty-nine thousand, nine hundred sixty-six".