66242057 has 16 divisors (see below), whose sum is σ = 76861440. Its totient is φ = 55919808.

The previous prime is 66242041. The next prime is 66242063. The reversal of 66242057 is 75024266.

66242057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66242057 - 2⁴ = 66242041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66242087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239003 + ... + 239279.

It is an arithmetic number, because the mean of its divisors is an integer number (4803840).

Almost surely, 2^66242057 is an apocalyptic number.

It is an amenable number.

66242057 is a deficient number, since it is larger than the sum of its proper divisors (10619383).

66242057 is a wasteful number, since it uses less digits than its factorization.

66242057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 66242057 is about 8138.9223488125. The cubic root of 66242057 is about 404.6174449886.

The spelling of 66242057 in words is "sixty-six million, two hundred forty-two thousand, fifty-seven".