66465090 has 32 divisors (see below), whose sum is σ = 177240960. Its totient is φ = 17723952.

The previous prime is 66465089. The next prime is 66465103. The reversal of 66465090 is 9056466.

It is a happy number.

66465090 is a `hidden beast` number, since 6 + 646 + 5 + 0 + 9 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

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, 122814 + ... + 123353.

It is an arithmetic number, because the mean of its divisors is an integer number (5538780).

Almost surely, 2^66465090 is an apocalyptic number.

66465090 is an abundant number, since it is smaller than the sum of its proper divisors (110775870).

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

66465090 is a wasteful number, since it uses less digits than its factorization.

66465090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246183 (or 246177 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 66465090 is about 8152.6124647256. The cubic root of 66465090 is about 405.0710437784.

The spelling of 66465090 in words is "sixty-six million, four hundred sixty-five thousand, ninety".