7666380438 has 8 divisors (see below), whose sum is σ = 15332760888. Its totient is φ = 2555460144.

The previous prime is 7666380437. The next prime is 7666380461. The reversal of 7666380438 is 8340836667.

It is a happy number.

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

7666380438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666380437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638865031 + ... + 638865042.

It is an arithmetic number, because the mean of its divisors is an integer number (1916595111).

Almost surely, 2^7666380438 is an apocalyptic number.

7666380438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7666380438 is a wasteful number, since it uses less digits than its factorization.

7666380438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277730078.

The product of its (nonzero) digits is 3483648, while the sum is 51.

The square root of 7666380438 is about 87557.8690809684. The cubic root of 7666380438 is about 1971.8026940812.

The spelling of 7666380438 in words is "seven billion, six hundred sixty-six million, three hundred eighty thousand, four hundred thirty-eight".