66414215 has 16 divisors (see below), whose sum is σ = 95877120. Its totient is φ = 43143840.

The previous prime is 66414211. The next prime is 66414239. The reversal of 66414215 is 51241466.

It is not a de Polignac number, because 66414215 - 2² = 66414211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66414211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49271 + ... + 50600.

It is an arithmetic number, because the mean of its divisors is an integer number (5992320).

Almost surely, 2^66414215 is an apocalyptic number.

66414215 is a deficient number, since it is larger than the sum of its proper divisors (29462905).

66414215 is a wasteful number, since it uses less digits than its factorization.

66414215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99902.

The product of its digits is 5760, while the sum is 29.

The square root of 66414215 is about 8149.4917019407. The cubic root of 66414215 is about 404.9676649488.

The spelling of 66414215 in words is "sixty-six million, four hundred fourteen thousand, two hundred fifteen".