6646748079 has 4 divisors (see below), whose sum is σ = 8862330776. Its totient is φ = 4431165384.

The previous prime is 6646748051. The next prime is 6646748113. The reversal of 6646748079 is 9708476466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6646748079 - 2¹⁵ = 6646715311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646798079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1107791344 + ... + 1107791349.

It is an arithmetic number, because the mean of its divisors is an integer number (2215582694).

Almost surely, 2^6646748079 is an apocalyptic number.

6646748079 is a deficient number, since it is larger than the sum of its proper divisors (2215582697).

6646748079 is a wasteful number, since it uses less digits than its factorization.

6646748079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215582696.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The square root of 6646748079 is about 81527.5909063919. The cubic root of 6646748079 is about 1880.1957770125.

The spelling of 6646748079 in words is "six billion, six hundred forty-six million, seven hundred forty-eight thousand, seventy-nine".