66482979961400 has 96 divisors (see below), whose sum is σ = 157271793447600. Its totient is φ = 26129786188800.

The previous prime is 66482979961399. The next prime is 66482979961423. The reversal of 66482979961400 is 416997928466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8767511 + ... + 14485689.

Almost surely, 2^{66482979961400} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66482979961400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78635896723800).

66482979961400 is an abundant number, since it is smaller than the sum of its proper divisors (90788813486200).

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

66482979961400 is a wasteful number, since it uses less digits than its factorization.

66482979961400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5719209 (or 5719200 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 71.

The spelling of 66482979961400 in words is "sixty-six trillion, four hundred eighty-two billion, nine hundred seventy-nine million, nine hundred sixty-one thousand, four hundred".