66175000209440 has 96 divisors (see below), whose sum is σ = 158043211191936. Its totient is φ = 26182315479040.

The previous prime is 66175000209413. The next prime is 66175000209457. The reversal of 66175000209440 is 4490200057166.

It is a super-2 number, since 2×66175000209440² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66175000209391 and 66175000209400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5150069 + ... + 12604491.

It is an arithmetic number, because the mean of its divisors is an integer number (1646283449916).

Almost surely, 2^{66175000209440} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66175000209440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79021605595968).

66175000209440 is an abundant number, since it is smaller than the sum of its proper divisors (91868210982496).

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

66175000209440 is a wasteful number, since it uses less digits than its factorization.

66175000209440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455042 (or 7455034 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 66175000209440 in words is "sixty-six trillion, one hundred seventy-five billion, two hundred nine thousand, four hundred forty".