66889476 has 60 divisors (see below), whose sum is σ = 175633920. Its totient is φ = 22198320.

The previous prime is 66889469. The next prime is 66889477. The reversal of 66889476 is 67498866.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (66889477) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 139405 + ... + 139883.

It is an arithmetic number, because the mean of its divisors is an integer number (2927232).

Almost surely, 2^66889476 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 66889476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87816960).

66889476 is an abundant number, since it is smaller than the sum of its proper divisors (108744444).

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

66889476 is a wasteful number, since it uses less digits than its factorization.

66889476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 915 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 66889476 is about 8178.5986574718. The cubic root of 66889476 is about 405.9313545198.

The spelling of 66889476 in words is "sixty-six million, eight hundred eighty-nine thousand, four hundred seventy-six".