6639429360 has 80 divisors (see below), whose sum is σ = 21291985440. Its totient is φ = 1709460480.

The previous prime is 6639429353. The next prime is 6639429367. The reversal of 6639429360 is 639249366.

It is an interprime number because it is at equal distance from previous prime (6639429353) and next prime (6639429367).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639429367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470011 + ... + 483930.

It is an arithmetic number, because the mean of its divisors is an integer number (266149818).

Almost surely, 2^6639429360 is an apocalyptic number.

6639429360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6639429360 is an abundant number, since it is smaller than the sum of its proper divisors (14652556080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6639429360 is a wasteful number, since it uses less digits than its factorization.

6639429360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953986 (or 953980 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 48.

The square root of 6639429360 is about 81482.6936226338. The cubic root of 6639429360 is about 1879.5054304910.

The spelling of 6639429360 in words is "six billion, six hundred thirty-nine million, four hundred twenty-nine thousand, three hundred sixty".