212666642794970 has 64 divisors (see below), whose sum is σ = 475541571568896. Its totient is φ = 66676463677440.

The previous prime is 212666642794943. The next prime is 212666642794981. The reversal of 212666642794970 is 79497246666212.

It is a junction number, because it is equal to n+sod(n) for n = 212666642794894 and 212666642794903.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1091956871 + ... + 1092151610.

It is an arithmetic number, because the mean of its divisors is an integer number (7430337055764).

Almost surely, 2^{212666642794970} is an apocalyptic number.

212666642794970 is an abundant number, since it is smaller than the sum of its proper divisors (262874928773926).

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

212666642794970 is a wasteful number, since it uses less digits than its factorization.

212666642794970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184108615.

The product of its (nonzero) digits is 658409472, while the sum is 71.

The spelling of 212666642794970 in words is "two hundred twelve trillion, six hundred sixty-six billion, six hundred forty-two million, seven hundred ninety-four thousand, nine hundred seventy".