66136950880 has 192 divisors, whose sum is σ = 209788766208. Its totient is φ = 19028367360.

The previous prime is 66136950821. The next prime is 66136950881. The reversal of 66136950880 is 8805963166.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66136950881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46312 + ... + 366631.

It is an arithmetic number, because the mean of its divisors is an integer number (1092649824).

Almost surely, 2^66136950880 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 66136950880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104894383104).

66136950880 is an abundant number, since it is smaller than the sum of its proper divisors (143651815328).

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

66136950880 is a wasteful number, since it uses less digits than its factorization.

66136950880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412989 (or 412981 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 66136950880 in words is "sixty-six billion, one hundred thirty-six million, nine hundred fifty thousand, eight hundred eighty".