2066013641 has 4 divisors (see below), whose sum is σ = 2073472452. Its totient is φ = 2058554832.

The previous prime is 2066013629. The next prime is 2066013643. The reversal of 2066013641 is 1463106602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 449652025 + 1616361616 = 21205^2 + 40204^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066013641 - 2²⁶ = 1998904777 is a prime.

It is a super-4 number, since 4×2066013641⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066013643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3728990 + ... + 3729543.

It is an arithmetic number, because the mean of its divisors is an integer number (518368113).

Almost surely, 2^2066013641 is an apocalyptic number.

It is an amenable number.

2066013641 is a deficient number, since it is larger than the sum of its proper divisors (7458811).

2066013641 is an equidigital number, since it uses as much as digits as its factorization.

2066013641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7458810.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 2066013641 is about 45453.4227644080. The cubic root of 2066013641 is about 1273.6332689745.

The spelling of 2066013641 in words is "two billion, sixty-six million, thirteen thousand, six hundred forty-one".