66226260020020 has 48 divisors (see below), whose sum is σ = 144306448710480. Its totient is φ = 25508827459584.

The previous prime is 66226260020017. The next prime is 66226260020029. The reversal of 66226260020020 is 2002006262266.

It can be written as a sum of positive squares in 8 ways, for example, as 4917297380004 + 61308962640016 = 2217498^2 + 7830004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66226260020029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461242375 + ... + 461385934.

It is an arithmetic number, because the mean of its divisors is an integer number (3006384348135).

Almost surely, 2^{66226260020020} is an apocalyptic number.

It is an amenable number.

66226260020020 is an abundant number, since it is smaller than the sum of its proper divisors (78080188690460).

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

66226260020020 is a wasteful number, since it uses less digits than its factorization.

66226260020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922628452 (or 922628450 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 66226260020020 its reverse (2002006262266), we get a palindrome (68228266282286).

The spelling of 66226260020020 in words is "sixty-six trillion, two hundred twenty-six billion, two hundred sixty million, twenty thousand, twenty".