7766442 has 40 divisors (see below), whose sum is σ = 17563392. Its totient is φ = 2565000.

The previous prime is 7766441. The next prime is 7766443. The reversal of 7766442 is 2446677.

7766442 is a `hidden beast` number, since 7 + 7 + 6 + 644 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (7766441) and next prime (7766443).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7766397 and 7766406.

It is not an unprimeable number, because it can be changed into a prime (7766441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30817 + ... + 31067.

Almost surely, 2^7766442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7766442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8781696).

7766442 is an abundant number, since it is smaller than the sum of its proper divisors (9796950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7766442 is a wasteful number, since it uses less digits than its factorization.

7766442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 447 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 7766442 is about 2786.8336871798. The cubic root of 7766442 is about 198.0344292746.

The spelling of 7766442 in words is "seven million, seven hundred sixty-six thousand, four hundred forty-two".