66015404466 has 64 divisors (see below), whose sum is σ = 145556611200. Its totient is φ = 19793408000.

The previous prime is 66015404437. The next prime is 66015404473. The reversal of 66015404466 is 66440451066.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15389650 + ... + 15393938.

It is an arithmetic number, because the mean of its divisors is an integer number (2274322050).

Almost surely, 2^66015404466 is an apocalyptic number.

66015404466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 66015404466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72778305600).

66015404466 is an abundant number, since it is smaller than the sum of its proper divisors (79541206734).

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

66015404466 is a wasteful number, since it uses less digits than its factorization.

66015404466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 66015404466 in words is "sixty-six billion, fifteen million, four hundred four thousand, four hundred sixty-six".