2666630644 has 12 divisors (see below), whose sum is σ = 4674557664. Its totient is φ = 1331042744.

The previous prime is 2666630641. The next prime is 2666630669. The reversal of 2666630644 is 4460366662.

It is a super-2 number, since 2×2666630644² = 14221837983039709472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2666630644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666630641) 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 3 ways as a sum of consecutive naturals, for example, 565504 + ... + 570199.

It is an arithmetic number, because the mean of its divisors is an integer number (389546472).

Almost surely, 2^2666630644 is an apocalyptic number.

It is an amenable number.

2666630644 is a deficient number, since it is larger than the sum of its proper divisors (2007927020).

2666630644 is a wasteful number, since it uses less digits than its factorization.

2666630644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136294 (or 1136292 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 43.

The square root of 2666630644 is about 51639.4291602841. The cubic root of 2666630644 is about 1386.7163044926.

The spelling of 2666630644 in words is "two billion, six hundred sixty-six million, six hundred thirty thousand, six hundred forty-four".