66489610 has 32 divisors (see below), whose sum is σ = 133607232. Its totient is φ = 23614080.

The previous prime is 66489589. The next prime is 66489691. The reversal of 66489610 is 1698466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2299 + ... + 11758.

It is an arithmetic number, because the mean of its divisors is an integer number (4175226).

Almost surely, 2^66489610 is an apocalyptic number.

66489610 is an abundant number, since it is smaller than the sum of its proper divisors (67117622).

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

66489610 is a wasteful number, since it uses less digits than its factorization.

66489610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14118.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 66489610 is about 8154.1161384910. The cubic root of 66489610 is about 405.1208499792.

The spelling of 66489610 in words is "sixty-six million, four hundred eighty-nine thousand, six hundred ten".