212066400365 has 4 divisors (see below), whose sum is σ = 254479680444. Its totient is φ = 169653120288.

The previous prime is 212066400353. The next prime is 212066400401. The reversal of 212066400365 is 563004660212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64030759849 + 148035640516 = 253043^2 + 384754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212066400365 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21206640032 + ... + 21206640041.

It is an arithmetic number, because the mean of its divisors is an integer number (63619920111).

Almost surely, 2^212066400365 is an apocalyptic number.

It is an amenable number.

212066400365 is a deficient number, since it is larger than the sum of its proper divisors (42413280079).

212066400365 is an equidigital number, since it uses as much as digits as its factorization.

212066400365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42413280078.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 212066400365 in words is "two hundred twelve billion, sixty-six million, four hundred thousand, three hundred sixty-five".