66377448 has 128 divisors (see below), whose sum is σ = 199065600. Its totient is φ = 20433600.

The previous prime is 66377447. The next prime is 66377449. The reversal of 66377448 is 84477366.

66377448 is a `hidden beast` number, since 6 + 637 + 7 + 4 + 4 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (66377447) and next prime (66377449).

It is not an unprimeable number, because it can be changed into a prime (66377447) 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, 153793 + ... + 154223.

It is an arithmetic number, because the mean of its divisors is an integer number (1555200).

Almost surely, 2^66377448 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 66377448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99532800).

66377448 is an abundant number, since it is smaller than the sum of its proper divisors (132688152).

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

66377448 is a wasteful number, since it uses less digits than its factorization.

66377448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 490 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 66377448 is about 8147.2356047926. The cubic root of 66377448 is about 404.8929209371.

The spelling of 66377448 in words is "sixty-six million, three hundred seventy-seven thousand, four hundred forty-eight".