212791666378 has 8 divisors (see below), whose sum is σ = 319189858560. Its totient is φ = 106395046860.

The previous prime is 212791666357. The next prime is 212791666379. The reversal of 212791666378 is 873666197212.

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

It is not an unprimeable number, because it can be changed into a prime (212791666379) 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, 40983 + ... + 653653.

It is an arithmetic number, because the mean of its divisors is an integer number (39898732320).

Almost surely, 2^212791666378 is an apocalyptic number.

212791666378 is a deficient number, since it is larger than the sum of its proper divisors (106398192182).

212791666378 is a wasteful number, since it uses less digits than its factorization.

212791666378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786332.

The product of its digits is 9144576, while the sum is 58.

The spelling of 212791666378 in words is "two hundred twelve billion, seven hundred ninety-one million, six hundred sixty-six thousand, three hundred seventy-eight".