6668723534 has 16 divisors (see below), whose sum is σ = 11264472576. Its totient is φ = 2933455800.

The previous prime is 6668723483. The next prime is 6668723539. The reversal of 6668723534 is 4353278666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668723539) 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, 4888412 + ... + 4889775.

It is an arithmetic number, because the mean of its divisors is an integer number (704029536).

Almost surely, 2^6668723534 is an apocalyptic number.

6668723534 is a deficient number, since it is larger than the sum of its proper divisors (4595749042).

6668723534 is a wasteful number, since it uses less digits than its factorization.

6668723534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9778231.

The product of its digits is 4354560, while the sum is 50.

The square root of 6668723534 is about 81662.2528099733. The cubic root of 6668723534 is about 1882.2655964860.

The spelling of 6668723534 in words is "six billion, six hundred sixty-eight million, seven hundred twenty-three thousand, five hundred thirty-four".