66702251008 has 88 divisors (see below), whose sum is σ = 141336539712. Its totient is φ = 31355142144.

The previous prime is 66702251003. The next prime is 66702251039. The reversal of 66702251008 is 80015220766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66702251003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23795335 + ... + 23798137.

Almost surely, 2^66702251008 is an apocalyptic number.

66702251008 is a gapful number since it is divisible by the number (68) 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 66702251008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70668269856).

66702251008 is an abundant number, since it is smaller than the sum of its proper divisors (74634288704).

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

66702251008 is a wasteful number, since it uses less digits than its factorization.

66702251008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207 (or 4189 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 66702251008 in words is "sixty-six billion, seven hundred two million, two hundred fifty-one thousand, eight".