66019122 has 48 divisors (see below), whose sum is σ = 154714560. Its totient is φ = 20225376.

The previous prime is 66019117. The next prime is 66019127. The reversal of 66019122 is 22191066.

It is an interprime number because it is at equal distance from previous prime (66019117) and next prime (66019127).

It is not an unprimeable number, because it can be changed into a prime (66019127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71379 + ... + 72297.

It is an arithmetic number, because the mean of its divisors is an integer number (3223220).

Almost surely, 2^66019122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66019122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77357280).

66019122 is an abundant number, since it is smaller than the sum of its proper divisors (88695438).

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

66019122 is a wasteful number, since it uses less digits than its factorization.

66019122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 66019122 is about 8125.2151971502. The cubic root of 66019122 is about 404.1630268753.

The spelling of 66019122 in words is "sixty-six million, nineteen thousand, one hundred twenty-two".