1966600878372 has 432 divisors, whose sum is σ = 5937058283520. Its totient is φ = 546421075200.

The previous prime is 1966600878329. The next prime is 1966600878373. The reversal of 1966600878372 is 2738780066691.

It is not an unprimeable number, because it can be changed into a prime (1966600878373) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 240088797 + ... + 240096987.

Almost surely, 2^{1966600878372} is an apocalyptic number.

1966600878372 is a gapful number since it is divisible by the number (12) 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 1966600878372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2968529141760).

1966600878372 is an abundant number, since it is smaller than the sum of its proper divisors (3970457405148).

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

1966600878372 is a wasteful number, since it uses less digits than its factorization.

1966600878372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8344 (or 8326 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 1966600878372 in words is "one trillion, nine hundred sixty-six billion, six hundred million, eight hundred seventy-eight thousand, three hundred seventy-two".