66938680062 has 48 divisors (see below), whose sum is σ = 151537145760. Its totient is φ = 21314912256.

The previous prime is 66938680057. The next prime is 66938680097. The reversal of 66938680062 is 26008683966.

It is a junction number, because it is equal to n+sod(n) for n = 66938679990 and 66938680008.

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, 213238 + ... + 423494.

It is an arithmetic number, because the mean of its divisors is an integer number (3157023870).

Almost surely, 2^66938680062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66938680062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75768572880).

66938680062 is an abundant number, since it is smaller than the sum of its proper divisors (84598465698).

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

66938680062 is a wasteful number, since it uses less digits than its factorization.

66938680062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211057 (or 211054 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 66938680062 in words is "sixty-six billion, nine hundred thirty-eight million, six hundred eighty thousand, sixty-two".