20297666364066 has 192 divisors, whose sum is σ = 55020597166080. Its totient is φ = 5265224173440.

The previous prime is 20297666364023. The next prime is 20297666364089. The reversal of 20297666364066 is 66046366679202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20297666363994 and 20297666364012.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48520591 + ... + 48937133.

It is an arithmetic number, because the mean of its divisors is an integer number (286565610240).

Almost surely, 2^{20297666364066} is an apocalyptic number.

20297666364066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20297666364066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27510298583040).

20297666364066 is an abundant number, since it is smaller than the sum of its proper divisors (34722930802014).

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

20297666364066 is a wasteful number, since it uses less digits than its factorization.

20297666364066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417061 (or 417058 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 63.

The spelling of 20297666364066 in words is "twenty trillion, two hundred ninety-seven billion, six hundred sixty-six million, three hundred sixty-four thousand, sixty-six".