6635666052 has 36 divisors (see below), whose sum is σ = 16794874096. Its totient is φ = 2209068720.

The previous prime is 6635666003. The next prime is 6635666137. The reversal of 6635666052 is 2506665366.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6635665989 and 6635666007.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 88774 + ... + 145437.

Almost surely, 2^6635666052 is an apocalyptic number.

It is an amenable number.

6635666052 is an abundant number, since it is smaller than the sum of its proper divisors (10159208044).

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

6635666052 is a wasteful number, since it uses less digits than its factorization.

6635666052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235008 (or 235003 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The square root of 6635666052 is about 81459.5976665733. The cubic root of 6635666052 is about 1879.1502546547.

The spelling of 6635666052 in words is "six billion, six hundred thirty-five million, six hundred sixty-six thousand, fifty-two".