212769539666 has 8 divisors (see below), whose sum is σ = 319164330240. Its totient is φ = 106381429588.

The previous prime is 212769539651. The next prime is 212769539669. The reversal of 212769539666 is 666935967212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 212769539599 and 212769539608.

It is not an unprimeable number, because it can be changed into a prime (212769539669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589726 + ... + 1718361.

It is an arithmetic number, because the mean of its divisors is an integer number (39895541280).

Almost surely, 2^212769539666 is an apocalyptic number.

212769539666 is a deficient number, since it is larger than the sum of its proper divisors (106394790574).

212769539666 is a wasteful number, since it uses less digits than its factorization.

212769539666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340248.

The product of its digits is 44089920, while the sum is 62.

The spelling of 212769539666 in words is "two hundred twelve billion, seven hundred sixty-nine million, five hundred thirty-nine thousand, six hundred sixty-six".