6668778597 has 8 divisors (see below), whose sum is σ = 9575682144. Its totient is φ = 4103863728.

The previous prime is 6668778577. The next prime is 6668778619. The reversal of 6668778597 is 7958778666.

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

It is not a de Polignac number, because 6668778597 - 2²⁶ = 6601669733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668778577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85497123 + ... + 85497200.

It is an arithmetic number, because the mean of its divisors is an integer number (1196960268).

Almost surely, 2^6668778597 is an apocalyptic number.

It is an amenable number.

6668778597 is a deficient number, since it is larger than the sum of its proper divisors (2906903547).

6668778597 is a wasteful number, since it uses less digits than its factorization.

6668778597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170994339.

The product of its digits is 213373440, while the sum is 69.

The square root of 6668778597 is about 81662.5899479070. The cubic root of 6668778597 is about 1882.2707770329.

Adding to 6668778597 its sum of digits (69), we get a palindrome (6668778666).

The spelling of 6668778597 in words is "six billion, six hundred sixty-eight million, seven hundred seventy-eight thousand, five hundred ninety-seven".