66732853440 has 448 divisors, whose sum is σ = 235011041280. Its totient is φ = 15909519360.

The previous prime is 66732853409. The next prime is 66732853463. The reversal of 66732853440 is 4435823766.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 66732853440.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 279216841 + ... + 279217079.

Almost surely, 2^66732853440 is an apocalyptic number.

66732853440 is a gapful number since it is divisible by the number (60) 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 66732853440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117505520640).

66732853440 is an abundant number, since it is smaller than the sum of its proper divisors (168278187840).

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

66732853440 is a wasteful number, since it uses less digits than its factorization.

66732853440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 66732853440 in words is "sixty-six billion, seven hundred thirty-two million, eight hundred fifty-three thousand, four hundred forty".