66284838 has 16 divisors (see below), whose sum is σ = 147299760. Its totient is φ = 22094928.

The previous prime is 66284773. The next prime is 66284839. The reversal of 66284838 is 83848266.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66284793 and 66284802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66284839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613695 + ... + 613802.

It is an arithmetic number, because the mean of its divisors is an integer number (9206235).

Almost surely, 2^66284838 is an apocalyptic number.

66284838 is an abundant number, since it is smaller than the sum of its proper divisors (81014922).

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

66284838 is a wasteful number, since it uses less digits than its factorization.

66284838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227508 (or 1227502 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 66284838 is about 8141.5500981079. The cubic root of 66284838 is about 404.7045307194.

The spelling of 66284838 in words is "sixty-six million, two hundred eighty-four thousand, eight hundred thirty-eight".