7666369 has 4 divisors (see below), whose sum is σ = 7673220. Its totient is φ = 7659520.

The previous prime is 7666357. The next prime is 7666381. The reversal of 7666369 is 9636667.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9636667 = 19 ⋅507193.

It is an interprime number because it is at equal distance from previous prime (7666357) and next prime (7666381).

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 5452225 = 1488^2 + 2335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7666369 is a prime.

It is a super-2 number, since 2×7666369² = 117546427288322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7666349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312 + ... + 4129.

It is an arithmetic number, because the mean of its divisors is an integer number (1918305).

Almost surely, 2^7666369 is an apocalyptic number.

It is an amenable number.

7666369 is a deficient number, since it is larger than the sum of its proper divisors (6851).

7666369 is a wasteful number, since it uses less digits than its factorization.

7666369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6850.

The product of its digits is 244944, while the sum is 43.

The square root of 7666369 is about 2768.8208681675. The cubic root of 7666369 is about 197.1801713458.

The spelling of 7666369 in words is "seven million, six hundred sixty-six thousand, three hundred sixty-nine".