1012666644 has 96 divisors (see below), whose sum is σ = 2874211200. Its totient is φ = 305786880.

The previous prime is 1012666637. The next prime is 1012666651. The reversal of 1012666644 is 4466662101.

It is an interprime number because it is at equal distance from previous prime (1012666637) and next prime (1012666651).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1012666599 and 1012666608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375252 + ... + 377940.

It is an arithmetic number, because the mean of its divisors is an integer number (29939700).

Almost surely, 2^1012666644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012666644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437105600).

1012666644 is an abundant number, since it is smaller than the sum of its proper divisors (1861544556).

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

1012666644 is a wasteful number, since it uses less digits than its factorization.

1012666644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030 (or 3022 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 1012666644 is about 31822.4236034907. The cubic root of 1012666644 is about 1004.2045119701.

The spelling of 1012666644 in words is "one billion, twelve million, six hundred sixty-six thousand, six hundred forty-four".