66485658 has 8 divisors (see below), whose sum is σ = 132971328. Its totient is φ = 22161884.

The previous prime is 66485651. The next prime is 66485677. The reversal of 66485658 is 85658466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

66485658 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (66485651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5540466 + ... + 5540477.

It is an arithmetic number, because the mean of its divisors is an integer number (16621416).

Almost surely, 2^66485658 is an apocalyptic number.

66485658 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66485658 is a wasteful number, since it uses less digits than its factorization.

66485658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11080948.

The product of its digits is 1382400, while the sum is 48.

The square root of 66485658 is about 8153.8738032913. The cubic root of 66485658 is about 405.1128233150.

The spelling of 66485658 in words is "sixty-six million, four hundred eighty-five thousand, six hundred fifty-eight".