7666426 has 8 divisors (see below), whose sum is σ = 11780244. Its totient is φ = 3739680.

The previous prime is 7666423. The next prime is 7666433. The reversal of 7666426 is 6246667.

It can be written as a sum of positive squares in 2 ways, for example, as 5267025 + 2399401 = 2295^2 + 1549^2 .

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

It is a super-2 number, since 2×7666426² = 117548175226952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7666423) 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, 46665 + ... + 46828.

Almost surely, 2^7666426 is an apocalyptic number.

7666426 is a deficient number, since it is larger than the sum of its proper divisors (4113818).

7666426 is a wasteful number, since it uses less digits than its factorization.

7666426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93536.

The product of its digits is 72576, while the sum is 37.

The square root of 7666426 is about 2768.8311613387. The cubic root of 7666426 is about 197.1806600275.

The spelling of 7666426 in words is "seven million, six hundred sixty-six thousand, four hundred twenty-six".