66611354160 has 320 divisors, whose sum is σ = 230321258496. Its totient is φ = 15814656000.

The previous prime is 66611354149. The next prime is 66611354219. The reversal of 66611354160 is 6145311666.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34141185 + ... + 34143135.

Almost surely, 2^66611354160 is an apocalyptic number.

66611354160 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 66611354160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115160629248).

66611354160 is an abundant number, since it is smaller than the sum of its proper divisors (163709904336).

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

66611354160 is a wasteful number, since it uses less digits than its factorization.

66611354160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 66611354160 in words is "sixty-six billion, six hundred eleven million, three hundred fifty-four thousand, one hundred sixty".