66146613 has 16 divisors (see below), whose sum is σ = 95625600. Its totient is φ = 40428864.

The previous prime is 66146579. The next prime is 66146623. The reversal of 66146613 is 31664166.

It is not a de Polignac number, because 66146613 - 2¹⁷ = 66015541 is a prime.

It is a super-3 number, since 3×66146613³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66146623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120 + ... + 11502.

It is an arithmetic number, because the mean of its divisors is an integer number (5976600).

Almost surely, 2^66146613 is an apocalyptic number.

It is an amenable number.

66146613 is a deficient number, since it is larger than the sum of its proper divisors (29478987).

66146613 is a wasteful number, since it uses less digits than its factorization.

66146613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11548.

The product of its digits is 15552, while the sum is 33.

The square root of 66146613 is about 8133.0568054084. The cubic root of 66146613 is about 404.4230223333.

It can be divided in two parts, 661 and 46613, that added together give a palindrome (47274).

The spelling of 66146613 in words is "sixty-six million, one hundred forty-six thousand, six hundred thirteen".