66445248 has 56 divisors (see below), whose sum is σ = 186153552. Its totient is φ = 20844544.

The previous prime is 66445237. The next prime is 66445259. The reversal of 66445248 is 84254466.

It is an interprime number because it is at equal distance from previous prime (66445237) and next prime (66445259).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6915 + ... + 13442.

Almost surely, 2^66445248 is an apocalyptic number.

66445248 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66445248 is an abundant number, since it is smaller than the sum of its proper divisors (119708304).

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

66445248 is a wasteful number, since it uses less digits than its factorization.

66445248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20389 (or 20379 counting only the distinct ones).

The product of its digits is 184320, while the sum is 39.

The square root of 66445248 is about 8151.3954633547. The cubic root of 66445248 is about 405.0307307881.

The spelling of 66445248 in words is "sixty-six million, four hundred forty-five thousand, two hundred forty-eight".