66273648 has 40 divisors (see below), whose sum is σ = 195666048. Its totient is φ = 18935232.

The previous prime is 66273637. The next prime is 66273659. The reversal of 66273648 is 84637266.

66273648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66273637) and next prime (66273659).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98286 + ... + 98957.

Almost surely, 2^66273648 is an apocalyptic number.

It is an amenable number.

66273648 is an abundant number, since it is smaller than the sum of its proper divisors (129392400).

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

66273648 is a wasteful number, since it uses less digits than its factorization.

66273648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197261 (or 197255 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 66273648 is about 8140.8628535309. The cubic root of 66273648 is about 404.6817557848.

The spelling of 66273648 in words is "sixty-six million, two hundred seventy-three thousand, six hundred forty-eight".