206945814664 has 32 divisors (see below), whose sum is σ = 393608289600. Its totient is φ = 101984491840.

The previous prime is 206945814659. The next prime is 206945814703. The reversal of 206945814664 is 466418549602.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1871199 + ... + 1978705.

It is an arithmetic number, because the mean of its divisors is an integer number (12300259050).

Almost surely, 2^206945814664 is an apocalyptic number.

It is an amenable number.

206945814664 is a deficient number, since it is larger than the sum of its proper divisors (186662474936).

206945814664 is a wasteful number, since it uses less digits than its factorization.

206945814664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110973 (or 110969 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 206945814664 in words is "two hundred six billion, nine hundred forty-five million, eight hundred fourteen thousand, six hundred sixty-four".