66522151 has 4 divisors (see below), whose sum is σ = 66620232. Its totient is φ = 66424072.

The previous prime is 66522119. The next prime is 66522163. The reversal of 66522151 is 15122566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66522151 - 2⁵ = 66522119 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 (66522551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48016 + ... + 49381.

It is an arithmetic number, because the mean of its divisors is an integer number (16655058).

Almost surely, 2^66522151 is an apocalyptic number.

66522151 is a deficient number, since it is larger than the sum of its proper divisors (98081).

66522151 is an equidigital number, since it uses as much as digits as its factorization.

66522151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98080.

The product of its digits is 3600, while the sum is 28.

The square root of 66522151 is about 8156.1112670194. Note that the first 3 decimals coincide. The cubic root of 66522151 is about 405.1869299151.

The spelling of 66522151 in words is "sixty-six million, five hundred twenty-two thousand, one hundred fifty-one".