208066580 has 24 divisors (see below), whose sum is σ = 439878600. Its totient is φ = 82666880.

The previous prime is 208066567. The next prime is 208066609. The reversal of 208066580 is 85660802.

It can be written as a sum of positive squares in 4 ways, for example, as 3519376 + 204547204 = 1876^2 + 14302^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 208066580.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31931 + ... + 37890.

It is an arithmetic number, because the mean of its divisors is an integer number (18328275).

Almost surely, 2^208066580 is an apocalyptic number.

208066580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208066580 is an abundant number, since it is smaller than the sum of its proper divisors (231812020).

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

208066580 is a wasteful number, since it uses less digits than its factorization.

208066580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69979 (or 69977 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 208066580 is about 14424.5131633619. The cubic root of 208066580 is about 592.5624258438.

The spelling of 208066580 in words is "two hundred eight million, sixty-six thousand, five hundred eighty".