66542151 has 32 divisors (see below), whose sum is σ = 102961152. Its totient is φ = 37889280.

The previous prime is 66542143. The next prime is 66542191. The reversal of 66542151 is 15124566.

It is not a de Polignac number, because 66542151 - 2³ = 66542143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66542101) 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 31 ways as a sum of consecutive naturals, for example, 26611 + ... + 29003.

It is an arithmetic number, because the mean of its divisors is an integer number (3217536).

Almost surely, 2^66542151 is an apocalyptic number.

66542151 is a deficient number, since it is larger than the sum of its proper divisors (36419001).

66542151 is a wasteful number, since it uses less digits than its factorization.

66542151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463.

The product of its digits is 7200, while the sum is 30.

The square root of 66542151 is about 8157.3372493725. The cubic root of 66542151 is about 405.2275325639.

The spelling of 66542151 in words is "sixty-six million, five hundred forty-two thousand, one hundred fifty-one".