66245990 has 8 divisors (see below), whose sum is σ = 119242800. Its totient is φ = 26498392.

The previous prime is 66245981. The next prime is 66246007. The reversal of 66245990 is 9954266.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3312290 + ... + 3312309.

It is an arithmetic number, because the mean of its divisors is an integer number (14905350).

Almost surely, 2^66245990 is an apocalyptic number.

66245990 is a deficient number, since it is larger than the sum of its proper divisors (52996810).

66245990 is a wasteful number, since it uses less digits than its factorization.

66245990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6624606.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 66245990 is about 8139.1639619804. The cubic root of 66245990 is about 404.6254526350.

The spelling of 66245990 in words is "sixty-six million, two hundred forty-five thousand, nine hundred ninety".