66218151 has 8 divisors (see below), whose sum is σ = 90344320. Its totient is φ = 43118712.

The previous prime is 66218149. The next prime is 66218153. The reversal of 66218151 is 15181266.

It is an interprime number because it is at equal distance from previous prime (66218149) and next prime (66218153).

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

It is not a de Polignac number, because 66218151 - 2¹ = 66218149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66218153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256531 + ... + 256788.

It is an arithmetic number, because the mean of its divisors is an integer number (11293040).

Almost surely, 2^66218151 is an apocalyptic number.

66218151 is a deficient number, since it is larger than the sum of its proper divisors (24126169).

66218151 is a wasteful number, since it uses less digits than its factorization.

66218151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513365.

The product of its digits is 2880, while the sum is 30.

The square root of 66218151 is about 8137.4535943377. The cubic root of 66218151 is about 404.5687651976.

The spelling of 66218151 in words is "sixty-six million, two hundred eighteen thousand, one hundred fifty-one".