66295157 has 8 divisors (see below), whose sum is σ = 68487096. Its totient is φ = 64124352.

The previous prime is 66295153. The next prime is 66295181. The reversal of 66295157 is 75159266.

It can be written as a sum of positive squares in 4 ways, for example, as 38056561 + 28238596 = 6169^2 + 5314^2 .

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 66295157 - 2² = 66295153 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 (66295153) 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, 1223 + ... + 11579.

It is an arithmetic number, because the mean of its divisors is an integer number (8560887).

Almost surely, 2^66295157 is an apocalyptic number.

It is an amenable number.

66295157 is a deficient number, since it is larger than the sum of its proper divisors (2191939).

66295157 is a wasteful number, since it uses less digits than its factorization.

66295157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10567.

The product of its digits is 113400, while the sum is 41.

The square root of 66295157 is about 8142.1837979746. The cubic root of 66295157 is about 404.7255306418.

The spelling of 66295157 in words is "sixty-six million, two hundred ninety-five thousand, one hundred fifty-seven".