66373483440 has 80 divisors (see below), whose sum is σ = 224463062016. Its totient is φ = 16090540800.

The previous prime is 66373483411. The next prime is 66373483487. The reversal of 66373483440 is 4438437366.

It is a tau number, because it is divible by the number of its divisors (80).

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 66373483440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12568096 + ... + 12573375.

Almost surely, 2^66373483440 is an apocalyptic number.

66373483440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66373483440 is an abundant number, since it is smaller than the sum of its proper divisors (158089578576).

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

66373483440 is a wasteful number, since it uses less digits than its factorization.

66373483440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25141498 (or 25141492 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 48.

The spelling of 66373483440 in words is "sixty-six billion, three hundred seventy-three million, four hundred eighty-three thousand, four hundred forty".