206929966 has 4 divisors (see below), whose sum is σ = 310394952. Its totient is φ = 103464982.

The previous prime is 206929963. The next prime is 206929981. The reversal of 206929966 is 669929602.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×206929966² = 85640021657522312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206929963) by changing a digit.

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 as a sum of consecutive naturals, namely, 51732490 + ... + 51732493.

It is an arithmetic number, because the mean of its divisors is an integer number (77598738).

Almost surely, 2^206929966 is an apocalyptic number.

206929966 is a deficient number, since it is larger than the sum of its proper divisors (103464986).

206929966 is a wasteful number, since it uses less digits than its factorization.

206929966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103464985.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 206929966 is about 14385.0605142975. The cubic root of 206929966 is about 591.4814499096.

The spelling of 206929966 in words is "two hundred six million, nine hundred twenty-nine thousand, nine hundred sixty-six".