6646053953 has 8 divisors (see below), whose sum is σ = 8285989440. Its totient is φ = 5178743280.

The previous prime is 6646053919. The next prime is 6646053959. The reversal of 6646053953 is 3593506466.

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

It is a cyclic number.

It is not a de Polignac number, because 6646053953 - 2¹⁸ = 6645791809 is a prime.

It is a super-4 number, since 4×6646053953⁴ (a number of 40 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6646053898 and 6646053907.

It is not an unprimeable number, because it can be changed into a prime (6646053959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43156118 + ... + 43156271.

It is an arithmetic number, because the mean of its divisors is an integer number (1035748680).

Almost surely, 2^6646053953 is an apocalyptic number.

It is an amenable number.

6646053953 is a deficient number, since it is larger than the sum of its proper divisors (1639935487).

6646053953 is a wasteful number, since it uses less digits than its factorization.

6646053953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86312407.

The product of its (nonzero) digits is 1749600, while the sum is 47.

The square root of 6646053953 is about 81523.3337946873. Note that the first 3 decimals coincide. The cubic root of 6646053953 is about 1880.1303245440.

The spelling of 6646053953 in words is "six billion, six hundred forty-six million, fifty-three thousand, nine hundred fifty-three".