6651959329 has 4 divisors (see below), whose sum is σ = 6941174976. Its totient is φ = 6362743684.

The previous prime is 6651959297. The next prime is 6651959333. The reversal of 6651959329 is 9239591566.

It is a happy number.

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: 9239591566 = 2 ⋅4619795783.

It is a cyclic number.

It is not a de Polignac number, because 6651959329 - 2⁵ = 6651959297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6651959329.

It is not an unprimeable number, because it can be changed into a prime (6651959339) 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, 144607789 + ... + 144607834.

It is an arithmetic number, because the mean of its divisors is an integer number (1735293744).

Almost surely, 2^6651959329 is an apocalyptic number.

It is an amenable number.

6651959329 is a deficient number, since it is larger than the sum of its proper divisors (289215647).

6651959329 is a wasteful number, since it uses less digits than its factorization.

6651959329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289215646.

The product of its digits is 3936600, while the sum is 55.

The square root of 6651959329 is about 81559.5446836236. The cubic root of 6651959329 is about 1880.6870252919.

The spelling of 6651959329 in words is "six billion, six hundred fifty-one million, nine hundred fifty-nine thousand, three hundred twenty-nine".