2064661880 has 16 divisors (see below), whose sum is σ = 4645489320. Its totient is φ = 825864736.

The previous prime is 2064661877. The next prime is 2064661909. The reversal of 2064661880 is 881664602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25808234 + ... + 25808313.

Almost surely, 2^2064661880 is an apocalyptic number.

2064661880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2064661880 is an abundant number, since it is smaller than the sum of its proper divisors (2580827440).

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

2064661880 is a wasteful number, since it uses less digits than its factorization.

2064661880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51616558 (or 51616554 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 2064661880 is about 45438.5505930812. The cubic root of 2064661880 is about 1273.3554354749.

The spelling of 2064661880 in words is "two billion, sixty-four million, six hundred sixty-one thousand, eight hundred eighty".