66037667850 has 1152 divisors, whose sum is σ = 249264046080. Its totient is φ = 12702096000.

The previous prime is 66037667809. The next prime is 66037667863. The reversal of 66037667850 is 5876673066.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 2130247335 + ... + 2130247365.

It is an arithmetic number, because the mean of its divisors is an integer number (216375040).

Almost surely, 2^66037667850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66037667850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124632023040).

66037667850 is an abundant number, since it is smaller than the sum of its proper divisors (183226378230).

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

66037667850 is a wasteful number, since it uses less digits than its factorization.

66037667850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 66037667850 in words is "sixty-six billion, thirty-seven million, six hundred sixty-seven thousand, eight hundred fifty".