6664016929 has 4 divisors (see below), whose sum is σ = 6687564976. Its totient is φ = 6640468884.

The previous prime is 6664016921. The next prime is 6664016993. The reversal of 6664016929 is 9296104666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9296104666 = 2 ⋅4648052333.

It is a cyclic number.

It is not a de Polignac number, because 6664016929 - 2³ = 6664016921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6664016921) 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, 11773599 + ... + 11774164.

It is an arithmetic number, because the mean of its divisors is an integer number (1671891244).

Almost surely, 2^6664016929 is an apocalyptic number.

It is an amenable number.

6664016929 is a deficient number, since it is larger than the sum of its proper divisors (23548047).

6664016929 is a wasteful number, since it uses less digits than its factorization.

6664016929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23548046.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 6664016929 is about 81633.4302170379. The cubic root of 6664016929 is about 1881.8226748580.

The spelling of 6664016929 in words is "six billion, six hundred sixty-four million, sixteen thousand, nine hundred twenty-nine".