66942269316 has 384 divisors, whose sum is σ = 205952785920. Its totient is φ = 18612633600.

The previous prime is 66942269309. The next prime is 66942269321. The reversal of 66942269316 is 61396224966.

66942269316 is a `hidden beast` number, since 6 + 69 + 4 + 2 + 269 + 316 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 65564886 + ... + 65565906.

It is an arithmetic number, because the mean of its divisors is an integer number (536335380).

Almost surely, 2^66942269316 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 66942269316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102976392960).

66942269316 is an abundant number, since it is smaller than the sum of its proper divisors (139010516604).

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

66942269316 is a wasteful number, since it uses less digits than its factorization.

66942269316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172 (or 1164 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The spelling of 66942269316 in words is "sixty-six billion, nine hundred forty-two million, two hundred sixty-nine thousand, three hundred sixteen".