206664402 has 16 divisors (see below), whose sum is σ = 472375872. Its totient is φ = 59046960.

The previous prime is 206664391. The next prime is 206664413. The reversal of 206664402 is 204466602.

It is an interprime number because it is at equal distance from previous prime (206664391) and next prime (206664413).

It is a self number, because there is not a number n which added to its sum of digits gives 206664402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2460249 + ... + 2460332.

It is an arithmetic number, because the mean of its divisors is an integer number (29523492).

Almost surely, 2^206664402 is an apocalyptic number.

206664402 is an abundant number, since it is smaller than the sum of its proper divisors (265711470).

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

206664402 is a wasteful number, since it uses less digits than its factorization.

206664402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4920593.

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

The square root of 206664402 is about 14375.8270022980. The cubic root of 206664402 is about 591.2283152776.

The spelling of 206664402 in words is "two hundred six million, six hundred sixty-four thousand, four hundred two".