6646229151 has 8 divisors (see below), whose sum is σ = 8931416064. Its totient is φ = 4395930840.

The previous prime is 6646229129. The next prime is 6646229153. The reversal of 6646229151 is 1519226466.

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

It is not a de Polignac number, because 6646229151 - 2⁵ = 6646229119 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646229153) 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, 8721705 + ... + 8722466.

It is an arithmetic number, because the mean of its divisors is an integer number (1116427008).

Almost surely, 2^6646229151 is an apocalyptic number.

6646229151 is a deficient number, since it is larger than the sum of its proper divisors (2285186913).

6646229151 is a wasteful number, since it uses less digits than its factorization.

6646229151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17444301.

The product of its digits is 155520, while the sum is 42.

The square root of 6646229151 is about 81524.4083143202. The cubic root of 6646229151 is about 1880.1468452334.

The spelling of 6646229151 in words is "six billion, six hundred forty-six million, two hundred twenty-nine thousand, one hundred fifty-one".