47575251666 has 80 divisors (see below), whose sum is σ = 112272415200. Its totient is φ = 15016015872.

The previous prime is 47575251637. The next prime is 47575251677. The reversal of 47575251666 is 66615257574.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

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 39 ways as a sum of consecutive naturals, for example, 10244341 + ... + 10248983.

It is an arithmetic number, because the mean of its divisors is an integer number (1403405190).

Almost surely, 2^47575251666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47575251666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56136207600).

47575251666 is an abundant number, since it is smaller than the sum of its proper divisors (64697163534).

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

47575251666 is a wasteful number, since it uses less digits than its factorization.

47575251666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8005 (or 7996 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 54.

The spelling of 47575251666 in words is "forty-seven billion, five hundred seventy-five million, two hundred fifty-one thousand, six hundred sixty-six".