2066371785 has 24 divisors (see below), whose sum is σ = 3588871104. Its totient is φ = 1099861920.

The previous prime is 2066371781. The next prime is 2066371787. The reversal of 2066371785 is 5871736602.

2066371785 is a `hidden beast` number, since 2 + 0 + 6 + 637 + 1 + 7 + 8 + 5 = 666.

It is not a de Polignac number, because 2066371785 - 2² = 2066371781 is a prime.

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 2066371785.

It is not an unprimeable number, because it can be changed into a prime (2066371781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23011 + ... + 68280.

It is an arithmetic number, because the mean of its divisors is an integer number (149536296).

Almost surely, 2^2066371785 is an apocalyptic number.

It is an amenable number.

2066371785 is a deficient number, since it is larger than the sum of its proper divisors (1522499319).

2066371785 is a wasteful number, since it uses less digits than its factorization.

2066371785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91805 (or 91802 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 2066371785 is about 45457.3622749935. The cubic root of 2066371785 is about 1273.7068596081.

The spelling of 2066371785 in words is "two billion, sixty-six million, three hundred seventy-one thousand, seven hundred eighty-five".