66070157 has 4 divisors (see below), whose sum is σ = 66122016. Its totient is φ = 66018300.

The previous prime is 66070141. The next prime is 66070187. The reversal of 66070157 is 75107066.

66070157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66070157 - 2⁴ = 66070141 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 (66070127) 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 3 ways as a sum of consecutive naturals, for example, 23969 + ... + 26582.

It is an arithmetic number, because the mean of its divisors is an integer number (16530504).

Almost surely, 2^66070157 is an apocalyptic number.

It is an amenable number.

66070157 is a deficient number, since it is larger than the sum of its proper divisors (51859).

66070157 is a wasteful number, since it uses less digits than its factorization.

66070157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51858.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 66070157 is about 8128.3551226555. The cubic root of 66070157 is about 404.2671439187.

The spelling of 66070157 in words is "sixty-six million, seventy thousand, one hundred fifty-seven".