66503085 has 16 divisors (see below), whose sum is σ = 116078400. Its totient is φ = 32243840.

The previous prime is 66503077. The next prime is 66503117. The reversal of 66503085 is 58030566.

It is not a de Polignac number, because 66503085 - 2³ = 66503077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent 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, 201360 + ... + 201689.

It is an arithmetic number, because the mean of its divisors is an integer number (7254900).

Almost surely, 2^66503085 is an apocalyptic number.

It is an amenable number.

66503085 is a deficient number, since it is larger than the sum of its proper divisors (49575315).

66503085 is a wasteful number, since it uses less digits than its factorization.

66503085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403068.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 66503085 is about 8154.9423664426. The cubic root of 66503085 is about 405.1482158324.

The spelling of 66503085 in words is "sixty-six million, five hundred three thousand, eighty-five".