66448356 has 48 divisors (see below), whose sum is σ = 167913984. Its totient is φ = 20330496.

The previous prime is 66448313. The next prime is 66448409. The reversal of 66448356 is 65384466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29005 + ... + 31211.

It is an arithmetic number, because the mean of its divisors is an integer number (3498208).

Almost surely, 2^66448356 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 66448356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83956992).

66448356 is an abundant number, since it is smaller than the sum of its proper divisors (101465628).

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

66448356 is a wasteful number, since it uses less digits than its factorization.

66448356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420 (or 2418 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 66448356 is about 8151.5861033298. The cubic root of 66448356 is about 405.0370458416.

The spelling of 66448356 in words is "sixty-six million, four hundred forty-eight thousand, three hundred fifty-six".