206240664 has 64 divisors (see below), whose sum is σ = 605203200. Its totient is φ = 57331584.

The previous prime is 206240633. The next prime is 206240669. The reversal of 206240664 is 466042602.

It is a super-2 number, since 2×206240664² = 85070422974321792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206240669) 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, 10374 + ... + 22805.

It is an arithmetic number, because the mean of its divisors is an integer number (9456300).

Almost surely, 2^206240664 is an apocalyptic number.

206240664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

206240664 is an abundant number, since it is smaller than the sum of its proper divisors (398962536).

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

206240664 is a wasteful number, since it uses less digits than its factorization.

206240664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33232 (or 33228 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 206240664 is about 14361.0815748675. The cubic root of 206240664 is about 590.8239603264.

The spelling of 206240664 in words is "two hundred six million, two hundred forty thousand, six hundred sixty-four".