66682397460 has 96 divisors (see below), whose sum is σ = 213732594432. Its totient is φ = 15216768000.

The previous prime is 66682397429. The next prime is 66682397489. The reversal of 66682397460 is 6479328666.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66682397460.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127960 + ... + 386960.

It is an arithmetic number, because the mean of its divisors is an integer number (2226381192).

Almost surely, 2^66682397460 is an apocalyptic number.

66682397460 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 66682397460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106866297216).

66682397460 is an abundant number, since it is smaller than the sum of its proper divisors (147050196972).

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

66682397460 is a wasteful number, since it uses less digits than its factorization.

66682397460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259633 (or 259631 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 57.

The spelling of 66682397460 in words is "sixty-six billion, six hundred eighty-two million, three hundred ninety-seven thousand, four hundred sixty".