208670466978 has 32 divisors (see below), whose sum is σ = 463841640000. Its totient is φ = 69537398688.

The previous prime is 208670466971. The next prime is 208670467007. The reversal of 208670466978 is 879664076802.

208670466978 is a `hidden beast` number, since 2 + 0 + 86 + 7 + 0 + 466 + 97 + 8 = 666.

208670466978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (208670466971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343728 + ... + 731771.

It is an arithmetic number, because the mean of its divisors is an integer number (14495051250).

Almost surely, 2^208670466978 is an apocalyptic number.

208670466978 is an abundant number, since it is smaller than the sum of its proper divisors (255171173022).

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

208670466978 is a wasteful number, since it uses less digits than its factorization.

208670466978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079103 (or 1079097 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 208670466978 in words is "two hundred eight billion, six hundred seventy million, four hundred sixty-six thousand, nine hundred seventy-eight".