206424222664 has 16 divisors (see below), whose sum is σ = 422231364720. Its totient is φ = 93829192080.

The previous prime is 206424222659. The next prime is 206424222673. The reversal of 206424222664 is 466222424602.

It is a happy number.

It is a super-2 number, since 2×206424222664² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172864814 + ... + 1172864989.

It is an arithmetic number, because the mean of its divisors is an integer number (26389460295).

Almost surely, 2^206424222664 is an apocalyptic number.

It is an amenable number.

206424222664 is an abundant number, since it is smaller than the sum of its proper divisors (215807142056).

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

206424222664 is a wasteful number, since it uses less digits than its factorization.

206424222664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345729820 (or 2345729816 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 206424222664 in words is "two hundred six billion, four hundred twenty-four million, two hundred twenty-two thousand, six hundred sixty-four".