66167371 has 4 divisors (see below), whose sum is σ = 67252144. Its totient is φ = 65082600.

The previous prime is 66167369. The next prime is 66167429. The reversal of 66167371 is 17376166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17376166 = 2 ⋅8688083.

It is a cyclic number.

It is not a de Polignac number, because 66167371 - 2¹ = 66167369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66167371.

It is not an unprimeable number, because it can be changed into a prime (66267371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542295 + ... + 542416.

It is an arithmetic number, because the mean of its divisors is an integer number (16813036).

Almost surely, 2^66167371 is an apocalyptic number.

66167371 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66167371 is a deficient number, since it is larger than the sum of its proper divisors (1084773).

66167371 is a wasteful number, since it uses less digits than its factorization.

66167371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084772.

The product of its digits is 31752, while the sum is 37.

The square root of 66167371 is about 8134.3328552500. The cubic root of 66167371 is about 404.4653229879.

The spelling of 66167371 in words is "sixty-six million, one hundred sixty-seven thousand, three hundred seventy-one".