2066640730 has 64 divisors (see below), whose sum is σ = 4787527680. Its totient is φ = 623361600.

The previous prime is 2066640707. The next prime is 2066640743. The reversal of 2066640730 is 370466602.

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, 19420 + ... + 67159.

It is an arithmetic number, because the mean of its divisors is an integer number (74805120).

Almost surely, 2^2066640730 is an apocalyptic number.

2066640730 is an abundant number, since it is smaller than the sum of its proper divisors (2720886950).

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

2066640730 is a wasteful number, since it uses less digits than its factorization.

2066640730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86635.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 2066640730 is about 45460.3203904240. The cubic root of 2066640730 is about 1273.7621162393.

The spelling of 2066640730 in words is "two billion, sixty-six million, six hundred forty thousand, seven hundred thirty".