6660001012 has 36 divisors (see below), whose sum is σ = 13689530400. Its totient is φ = 2826566064.

The previous prime is 6660000979. The next prime is 6660001013. The reversal of 6660001012 is 2101000666.

It is a super-2 number, since 2×6660001012² = 88711226959682048288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660001013) 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 11 ways as a sum of consecutive naturals, for example, 144762 + ... + 185137.

Almost surely, 2^6660001012 is an apocalyptic number.

It is an amenable number.

6660001012 is an abundant number, since it is smaller than the sum of its proper divisors (7029529388).

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

6660001012 is a wasteful number, since it uses less digits than its factorization.

6660001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330020 (or 330011 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 6660001012 is about 81608.8292527224. The cubic root of 6660001012 is about 1881.4445864705. Note that the first 3 decimals are identical.

Adding to 6660001012 its reverse (2101000666), we get a palindrome (8761001678).

The spelling of 6660001012 in words is "six billion, six hundred sixty million, one thousand, twelve".