66530015 has 8 divisors (see below), whose sum is σ = 79885440. Its totient is φ = 53191072.

The previous prime is 66529997. The next prime is 66530029. The reversal of 66530015 is 51003566.

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

It is a cyclic number.

It is not a de Polignac number, because 66530015 - 2¹⁰ = 66528991 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 8021 + ... + 14049.

It is an arithmetic number, because the mean of its divisors is an integer number (9985680).

Almost surely, 2^66530015 is an apocalyptic number.

66530015 is a deficient number, since it is larger than the sum of its proper divisors (13355425).

66530015 is a wasteful number, since it uses less digits than its factorization.

66530015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8241.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 66530015 is about 8156.5933452637. The cubic root of 66530015 is about 405.2028958473.

The spelling of 66530015 in words is "sixty-six million, five hundred thirty thousand, fifteen".