2066578320 has 80 divisors (see below), whose sum is σ = 6743586240. Its totient is φ = 522081792.

The previous prime is 2066578303. The next prime is 2066578321. The reversal of 2066578320 is 238756602.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (2066578321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222039 + ... + 231158.

It is an arithmetic number, because the mean of its divisors is an integer number (84294828).

Almost surely, 2^2066578320 is an apocalyptic number.

2066578320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2066578320 is an abundant number, since it is smaller than the sum of its proper divisors (4677007920).

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

2066578320 is a wasteful number, since it uses less digits than its factorization.

2066578320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453232 (or 453226 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 2066578320 is about 45459.6339624507. The cubic root of 2066578320 is about 1273.7492940955.

The spelling of 2066578320 in words is "two billion, sixty-six million, five hundred seventy-eight thousand, three hundred twenty".