66555151 has 8 divisors (see below), whose sum is σ = 71738240. Its totient is φ = 61381152.

The previous prime is 66555107. The next prime is 66555199. The reversal of 66555151 is 15155566.

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 66555151 - 2⁷ = 66555023 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 (66555851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26665 + ... + 29053.

It is an arithmetic number, because the mean of its divisors is an integer number (8967280).

Almost surely, 2^66555151 is an apocalyptic number.

66555151 is a deficient number, since it is larger than the sum of its proper divisors (5183089).

66555151 is a wasteful number, since it uses less digits than its factorization.

66555151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545.

The product of its digits is 22500, while the sum is 34.

The square root of 66555151 is about 8158.1340391048. The cubic root of 66555151 is about 405.2539199230.

The spelling of 66555151 in words is "sixty-six million, five hundred fifty-five thousand, one hundred fifty-one".