7966687 has 4 divisors (see below), whose sum is σ = 8024976. Its totient is φ = 7908400.

The previous prime is 7966663. The next prime is 7966691. The reversal of 7966687 is 7866697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7866697 = 673 ⋅11689.

It is a cyclic number.

It is not a de Polignac number, because 7966687 - 2⁷ = 7966559 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 7966687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7966627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28939 + ... + 29212.

It is an arithmetic number, because the mean of its divisors is an integer number (2006244).

Almost surely, 2^7966687 is an apocalyptic number.

7966687 is a deficient number, since it is larger than the sum of its proper divisors (58289).

7966687 is a wasteful number, since it uses less digits than its factorization.

7966687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58288.

The product of its digits is 762048, while the sum is 49.

The square root of 7966687 is about 2822.5320193047. The cubic root of 7966687 is about 199.7220054408.

It can be divided in two parts, 79 and 66687, that added together give a palindrome (66766).

The spelling of 7966687 in words is "seven million, nine hundred sixty-six thousand, six hundred eighty-seven".