66951491200 has 384 divisors, whose sum is σ = 192958899840. Its totient is φ = 22708224000.

The previous prime is 66951491171. The next prime is 66951491203. The reversal of 66951491200 is 219415966.

It is not an unprimeable number, because it can be changed into a prime (66951491203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33192592 + ... + 33194608.

It is an arithmetic number, because the mean of its divisors is an integer number (502497135).

Almost surely, 2^66951491200 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 66951491200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96479449920).

66951491200 is an abundant number, since it is smaller than the sum of its proper divisors (126007408640).

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

66951491200 is a wasteful number, since it uses less digits than its factorization.

66951491200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116 (or 2099 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 66951491200 in words is "sixty-six billion, nine hundred fifty-one million, four hundred ninety-one thousand, two hundred".