2066946639 has 8 divisors (see below), whose sum is σ = 2756925360. Its totient is φ = 1377466176.

The previous prime is 2066946611. The next prime is 2066946641. The reversal of 2066946639 is 9366496602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2066946639 - 2⁸ = 2066946383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2066946591 and 2066946600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066946659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114774 + ... + 131555.

It is an arithmetic number, because the mean of its divisors is an integer number (344615670).

Almost surely, 2^2066946639 is an apocalyptic number.

2066946639 is a deficient number, since it is larger than the sum of its proper divisors (689978721).

2066946639 is a wasteful number, since it uses less digits than its factorization.

2066946639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249129.

The product of its (nonzero) digits is 2519424, while the sum is 51.

The square root of 2066946639 is about 45463.6848374612. The cubic root of 2066946639 is about 1273.8249615555.

The spelling of 2066946639 in words is "two billion, sixty-six million, nine hundred forty-six thousand, six hundred thirty-nine".