66157471 has 2 divisors, whose sum is σ = 66157472. Its totient is φ = 66157470.

The previous prime is 66157459. The next prime is 66157493. The reversal of 66157471 is 17475166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66157471 - 2¹¹ = 66155423 is a prime.

It is a super-3 number, since 3×66157471³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66157471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66157451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33078735 + 33078736.

It is an arithmetic number, because the mean of its divisors is an integer number (33078736).

Almost surely, 2^66157471 is an apocalyptic number.

66157471 is a deficient number, since it is larger than the sum of its proper divisors (1).

66157471 is an equidigital number, since it uses as much as digits as its factorization.

66157471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 66157471 is about 8133.7243007124. The cubic root of 66157471 is about 404.4451498705.

The spelling of 66157471 in words is "sixty-six million, one hundred fifty-seven thousand, four hundred seventy-one".