7665998 has 4 divisors (see below), whose sum is σ = 11499000. Its totient is φ = 3832998.

The previous prime is 7665979. The next prime is 7666003. The reversal of 7665998 is 8995667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8995667 = 1721 ⋅5227.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1916498 + ... + 1916501.

It is an arithmetic number, because the mean of its divisors is an integer number (2874750).

Almost surely, 2^7665998 is an apocalyptic number.

7665998 is a deficient number, since it is larger than the sum of its proper divisors (3833002).

7665998 is a wasteful number, since it uses less digits than its factorization.

7665998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833001.

The product of its digits is 816480, while the sum is 50.

The square root of 7665998 is about 2768.7538713291. The cubic root of 7665998 is about 197.1769905691.

The spelling of 7665998 in words is "seven million, six hundred sixty-five thousand, nine hundred ninety-eight".