7666478454 has 32 divisors (see below), whose sum is σ = 16696512000. Its totient is φ = 2337509664.

The previous prime is 7666478411. The next prime is 7666478459. The reversal of 7666478454 is 4548746667.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 7666478394 and 7666478403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666478459) 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 15 ways as a sum of consecutive naturals, for example, 1156174 + ... + 1162785.

It is an arithmetic number, because the mean of its divisors is an integer number (521766000).

Almost surely, 2^7666478454 is an apocalyptic number.

7666478454 is an abundant number, since it is smaller than the sum of its proper divisors (9030033546).

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

7666478454 is a wasteful number, since it uses less digits than its factorization.

7666478454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319012.

The product of its digits is 27095040, while the sum is 57.

The square root of 7666478454 is about 87558.4288004302. The cubic root of 7666478454 is about 1971.8110973249.

The spelling of 7666478454 in words is "seven billion, six hundred sixty-six million, four hundred seventy-eight thousand, four hundred fifty-four".