66152817450 has 120 divisors (see below), whose sum is σ = 185130755040. Its totient is φ = 17513690400.

The previous prime is 66152817431. The next prime is 66152817481. The reversal of 66152817450 is 5471825166.

66152817450 is a `hidden beast` number, since 6 + 6 + 1 + 528 + 1 + 74 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 66152817396 and 66152817405.

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 59 ways as a sum of consecutive naturals, for example, 504195 + ... + 621705.

It is an arithmetic number, because the mean of its divisors is an integer number (1542756292).

Almost surely, 2^66152817450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66152817450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92565377520).

66152817450 is an abundant number, since it is smaller than the sum of its proper divisors (118977937590).

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

66152817450 is a wasteful number, since it uses less digits than its factorization.

66152817450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117674 (or 117660 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 66152817450 in words is "sixty-six billion, one hundred fifty-two million, eight hundred seventeen thousand, four hundred fifty".