66358593900 has 360 divisors, whose sum is σ = 228437160336. Its totient is φ = 16605388800.

The previous prime is 66358593839. The next prime is 66358593901. The reversal of 66358593900 is 939585366.

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

It is not an unprimeable number, because it can be changed into a prime (66358593901) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 75321460 + ... + 75322340.

Almost surely, 2^66358593900 is an apocalyptic number.

66358593900 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 66358593900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114218580168).

66358593900 is an abundant number, since it is smaller than the sum of its proper divisors (162078566436).

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

66358593900 is a wasteful number, since it uses less digits than its factorization.

66358593900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1455 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 54.

The spelling of 66358593900 in words is "sixty-six billion, three hundred fifty-eight million, five hundred ninety-three thousand, nine hundred".