122664345721986 has 32 divisors (see below), whose sum is σ = 258241720688640. Its totient is φ = 38735960247504.

The previous prime is 122664345721787. The next prime is 122664345721987. The reversal of 122664345721986 is 689127543466221.

It is a super-2 number, since 2×122664345721986² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122664345721987) 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, 29865951 + ... + 33723933.

It is an arithmetic number, because the mean of its divisors is an integer number (8070053771520).

Almost surely, 2^{122664345721986} is an apocalyptic number.

122664345721986 is an abundant number, since it is smaller than the sum of its proper divisors (135577374966654).

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

122664345721986 is a wasteful number, since it uses less digits than its factorization.

122664345721986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136910.

The product of its digits is 209018880, while the sum is 66.

The spelling of 122664345721986 in words is "one hundred twenty-two trillion, six hundred sixty-four billion, three hundred forty-five million, seven hundred twenty-one thousand, nine hundred eighty-six".