65990683606226 has 8 divisors (see below), whose sum is σ = 98986189454460. Its totient is φ = 32995287121408.

The previous prime is 65990683606219. The next prime is 65990683606229. The reversal of 65990683606226 is 62260638609956.

It is a Cunningham number, because it is equal to 8123465²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 65990683606225 + 1 = 8123465^2 + 1^2 .

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 (65990683606229) 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, 25815311 + ... + 28256178.

Almost surely, 2^{65990683606226} is an apocalyptic number.

65990683606226 is a deficient number, since it is larger than the sum of its proper divisors (32995505848234).

65990683606226 is a wasteful number, since it uses less digits than its factorization.

65990683606226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54681708.

The product of its (nonzero) digits is 302330880, while the sum is 68.

The spelling of 65990683606226 in words is "sixty-five trillion, nine hundred ninety billion, six hundred eighty-three million, six hundred six thousand, two hundred twenty-six".