2665006785 has 128 divisors (see below), whose sum is σ = 6035558400. Its totient is φ = 1086151680.

The previous prime is 2665006783. The next prime is 2665006789. The reversal of 2665006785 is 5876005662.

2665006785 is a `hidden beast` number, since 2 + 6 + 6 + 500 + 67 + 85 = 666.

2665006785 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2665006785 - 2¹ = 2665006783 is a prime.

It is a super-2 number, since 2×2665006785² = 14204522328192072450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2665006785.

It is not an unprimeable number, because it can be changed into a prime (2665006783) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 300870 + ... + 309600.

It is an arithmetic number, because the mean of its divisors is an integer number (47152800).

Almost surely, 2^2665006785 is an apocalyptic number.

It is an amenable number.

2665006785 is an abundant number, since it is smaller than the sum of its proper divisors (3370551615).

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

2665006785 is a wasteful number, since it uses less digits than its factorization.

2665006785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8788 (or 8782 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 2665006785 is about 51623.7037125389. The cubic root of 2665006785 is about 1386.4347645651.

The spelling of 2665006785 in words is "two billion, six hundred sixty-five million, six thousand, seven hundred eighty-five".