66030215 has 4 divisors (see below), whose sum is σ = 79236264. Its totient is φ = 52824168.

The previous prime is 66030119. The next prime is 66030229. The reversal of 66030215 is 51203066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51203066 = 2 ⋅25601533.

It is a cyclic number.

It is not a de Polignac number, because 66030215 - 2¹⁰ = 66029191 is a prime.

It is a Duffinian number.

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, 6603017 + ... + 6603026.

It is an arithmetic number, because the mean of its divisors is an integer number (19809066).

Almost surely, 2^66030215 is an apocalyptic number.

66030215 is a deficient number, since it is larger than the sum of its proper divisors (13206049).

66030215 is a wasteful number, since it uses less digits than its factorization.

66030215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13206048.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 66030215 is about 8125.8977965515. The cubic root of 66030215 is about 404.1856623847.

The spelling of 66030215 in words is "sixty-six million, thirty thousand, two hundred fifteen".