66201415 has 16 divisors (see below), whose sum is σ = 95569920. Its totient is φ = 43005600.

The previous prime is 66201413. The next prime is 66201479. The reversal of 66201415 is 51410266.

It is not a de Polignac number, because 66201415 - 2¹ = 66201413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66201415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66201413) 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, 49111 + ... + 50440.

It is an arithmetic number, because the mean of its divisors is an integer number (5973120).

Almost surely, 2^66201415 is an apocalyptic number.

66201415 is a deficient number, since it is larger than the sum of its proper divisors (29368505).

66201415 is a wasteful number, since it uses less digits than its factorization.

66201415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99582.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 66201415 is about 8136.4251978372. The cubic root of 66201415 is about 404.5346787059.

The spelling of 66201415 in words is "sixty-six million, two hundred one thousand, four hundred fifteen".