66488017 has 4 divisors (see below), whose sum is σ = 66542500. Its totient is φ = 66433536.

The previous prime is 66487991. The next prime is 66488027. The reversal of 66488017 is 71088466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11861136 + 54626881 = 3444^2 + 7391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66488017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66488027) 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, 25368 + ... + 27865.

It is an arithmetic number, because the mean of its divisors is an integer number (16635625).

Almost surely, 2^66488017 is an apocalyptic number.

It is an amenable number.

66488017 is a deficient number, since it is larger than the sum of its proper divisors (54483).

66488017 is a wasteful number, since it uses less digits than its factorization.

66488017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54482.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 66488017 is about 8154.0184571780. The cubic root of 66488017 is about 405.1176145731.

The spelling of 66488017 in words is "sixty-six million, four hundred eighty-eight thousand, seventeen".