66681104 has 40 divisors (see below), whose sum is σ = 151651008. Its totient is φ = 27803520.

The previous prime is 66681091. The next prime is 66681107. The reversal of 66681104 is 40118666.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66681107) 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, 3902 + ... + 12189.

Almost surely, 2^66681104 is an apocalyptic number.

It is an amenable number.

66681104 is an abundant number, since it is smaller than the sum of its proper divisors (84969904).

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

66681104 is a wasteful number, since it uses less digits than its factorization.

66681104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16143 (or 16137 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 66681104 is about 8165.8498639150. The cubic root of 66681104 is about 405.5094011848.

The spelling of 66681104 in words is "sixty-six million, six hundred eighty-one thousand, one hundred four".