66046590 has 80 divisors (see below), whose sum is σ = 180390672. Its totient is φ = 17335296.

The previous prime is 66046571. The next prime is 66046619. The reversal of 66046590 is 9564066.

It is a happy number.

66046590 is a `hidden beast` number, since 6 + 60 + 4 + 6 + 590 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 53662 + ... + 54878.

Almost surely, 2^66046590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66046590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90195336).

66046590 is an abundant number, since it is smaller than the sum of its proper divisors (114344082).

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

66046590 is a wasteful number, since it uses less digits than its factorization.

66046590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303 (or 1294 counting only the distinct ones).

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

The square root of 66046590 is about 8126.9053150630. The cubic root of 66046590 is about 404.2190712980.

The spelling of 66046590 in words is "sixty-six million, forty-six thousand, five hundred ninety".