7666998 has 8 divisors (see below), whose sum is σ = 15334008. Its totient is φ = 2555664.

The previous prime is 7666993. The next prime is 7666999. The reversal of 7666998 is 8996667.

It is a happy number.

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

7666998 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 7666998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666993) 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, 638911 + ... + 638922.

It is an arithmetic number, because the mean of its divisors is an integer number (1916751).

Almost surely, 2^7666998 is an apocalyptic number.

7666998 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.

7666998 is a wasteful number, since it uses less digits than its factorization.

7666998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277838.

The product of its digits is 979776, while the sum is 51.

The square root of 7666998 is about 2768.9344520952. The cubic root of 7666998 is about 197.1855638567.

It can be divided in two parts, 76669 and 98, that added together give a palindrome (76767).

The spelling of 7666998 in words is "seven million, six hundred sixty-six thousand, nine hundred ninety-eight".