66677380 has 96 divisors (see below), whose sum is σ = 180714240. Its totient is φ = 20052480.

The previous prime is 66677363. The next prime is 66677381. The reversal of 66677380 is 8377666.

It is not an unprimeable number, because it can be changed into a prime (66677381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43914 + ... + 45406.

It is an arithmetic number, because the mean of its divisors is an integer number (1882440).

Almost surely, 2^66677380 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 66677380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90357120).

66677380 is an abundant number, since it is smaller than the sum of its proper divisors (114036860).

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

66677380 is a wasteful number, since it uses less digits than its factorization.

66677380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549 (or 1547 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 66677380 is about 8165.6218379251. The cubic root of 66677380 is about 405.5018520940.

The spelling of 66677380 in words is "sixty-six million, six hundred seventy-seven thousand, three hundred eighty".