66157 has 8 divisors (see below), whose sum is σ = 81536. Its totient is φ = 52272.

The previous prime is 66137. The next prime is 66161. The reversal of 66157 is 75166.

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 66157 - 2⁷ = 66029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273 + ... + 454.

It is an arithmetic number, because the mean of its divisors is an integer number (10192).

2⁶⁶¹⁵⁷ is an apocalyptic number.

66157 is the 149-th hex number.

It is an amenable number.

66157 is a deficient number, since it is larger than the sum of its proper divisors (15379).

66157 is a wasteful number, since it uses less digits than its factorization.

66157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747.

The product of its digits is 1260, while the sum is 25.

The square root of 66157 is about 257.2100309086. The cubic root of 66157 is about 40.4444190069. Note that the first 4 decimals are identical.

Subtracting 66157 from its reverse (75166), we obtain a palindrome (9009).

The spelling of 66157 in words is "sixty-six thousand, one hundred fifty-seven".