206675640 has 48 divisors (see below), whose sum is σ = 671697000. Its totient is φ = 55113408.

The previous prime is 206675633. The next prime is 206675641. The reversal of 206675640 is 46576602.

206675640 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 7 + 5 + 640 = 666.

206675640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 206675595 and 206675604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206675641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286690 + ... + 287409.

Almost surely, 2^206675640 is an apocalyptic number.

206675640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206675640 is an abundant number, since it is smaller than the sum of its proper divisors (465021360).

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

206675640 is a wasteful number, since it uses less digits than its factorization.

206675640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574116 (or 574109 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 206675640 is about 14376.2178614544. The cubic root of 206675640 is about 591.2390316908.

The spelling of 206675640 in words is "two hundred six million, six hundred seventy-five thousand, six hundred forty".