66446698032 has 960 divisors, whose sum is σ = 247818424320. Its totient is φ = 16821043200.

The previous prime is 66446697983. The next prime is 66446698067. The reversal of 66446698032 is 23089664466.

66446698032 is a `hidden beast` number, since 6 + 64 + 466 + 98 + 0 + 32 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66446698032.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 423227298 + ... + 423227454.

It is an arithmetic number, because the mean of its divisors is an integer number (258144192).

Almost surely, 2^66446698032 is an apocalyptic number.

66446698032 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66446698032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123909212160).

66446698032 is an abundant number, since it is smaller than the sum of its proper divisors (181371726288).

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

66446698032 is a wasteful number, since it uses less digits than its factorization.

66446698032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 66446698032 in words is "sixty-six billion, four hundred forty-six million, six hundred ninety-eight thousand, thirty-two".