206875664 has 10 divisors (see below), whose sum is σ = 400821630. Its totient is φ = 103437824.

The previous prime is 206875663. The next prime is 206875673. The reversal of 206875664 is 466578602.

It can be written as a sum of positive squares in only one way, i.e., 199035664 + 7840000 = 14108^2 + 2800^2 .

It is not an unprimeable number, because it can be changed into a prime (206875661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6464849 + ... + 6464880.

It is an arithmetic number, because the mean of its divisors is an integer number (40082163).

Almost surely, 2^206875664 is an apocalyptic number.

It is an amenable number.

206875664 is a deficient number, since it is larger than the sum of its proper divisors (193945966).

206875664 is a wasteful number, since it uses less digits than its factorization.

206875664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12929737 (or 12929731 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 206875664 is about 14383.1729461896. The cubic root of 206875664 is about 591.4297070644.

The spelling of 206875664 in words is "two hundred six million, eight hundred seventy-five thousand, six hundred sixty-four".