206664260 has 48 divisors (see below), whose sum is σ = 475276032. Its totient is φ = 74860800.

The previous prime is 206664253. The next prime is 206664287. The reversal of 206664260 is 62466602.

It is a super-2 number, since 2×206664260² = 85420232722695200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60149 + ... + 63491.

It is an arithmetic number, because the mean of its divisors is an integer number (9901584).

Almost surely, 2^206664260 is an apocalyptic number.

206664260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206664260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237638016).

206664260 is an abundant number, since it is smaller than the sum of its proper divisors (268611772).

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

206664260 is a wasteful number, since it uses less digits than its factorization.

206664260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644 (or 3642 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 206664260 is about 14375.8220634508. The cubic root of 206664260 is about 591.2281798657.

It can be divided in two parts, 206 and 664260, that added together give a palindrome (664466).

The spelling of 206664260 in words is "two hundred six million, six hundred sixty-four thousand, two hundred sixty".