66122061157212 has 48 divisors (see below), whose sum is σ = 158011122724224. Its totient is φ = 21513872952000.

The previous prime is 66122061157193. The next prime is 66122061157231. The reversal of 66122061157212 is 21275116022166.

It is an interprime number because it is at equal distance from previous prime (66122061157193) and next prime (66122061157231).

It is a super-2 number, since 2×66122061157212² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344677714 + ... + 344869497.

It is an arithmetic number, because the mean of its divisors is an integer number (3291898390088).

Almost surely, 2^{66122061157212} is an apocalyptic number.

It is an amenable number.

66122061157212 is an abundant number, since it is smaller than the sum of its proper divisors (91889061567012).

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

66122061157212 is a wasteful number, since it uses less digits than its factorization.

66122061157212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689547410 (or 689547408 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

Adding to 66122061157212 its reverse (21275116022166), we get a palindrome (87397177179378).

The spelling of 66122061157212 in words is "sixty-six trillion, one hundred twenty-two billion, sixty-one million, one hundred fifty-seven thousand, two hundred twelve".