66885194376 has 384 divisors, whose sum is σ = 243726013440. Its totient is φ = 16003008000.

The previous prime is 66885194371. The next prime is 66885194381. The reversal of 66885194376 is 67349158866.

66885194376 is a `hidden beast` number, since 6 + 6 + 8 + 8 + 519 + 43 + 76 = 666.

It is an interprime number because it is at equal distance from previous prime (66885194371) and next prime (66885194381).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (66885194371) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 63639051 + ... + 63640101.

It is an arithmetic number, because the mean of its divisors is an integer number (634703160).

Almost surely, 2^66885194376 is an apocalyptic number.

66885194376 is a gapful number since it is divisible by the number (66) 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 66885194376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121863006720).

66885194376 is an abundant number, since it is smaller than the sum of its proper divisors (176840819064).

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

66885194376 is a wasteful number, since it uses less digits than its factorization.

66885194376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977 (or 1970 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 66885194376 in words is "sixty-six billion, eight hundred eighty-five million, one hundred ninety-four thousand, three hundred seventy-six".