66142371 has 8 divisors (see below), whose sum is σ = 89014464. Its totient is φ = 43682600.

The previous prime is 66142343. The next prime is 66142423. The reversal of 66142371 is 17324166.

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 66142371 - 2¹³ = 66134179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66102371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102705 + ... + 103346.

It is an arithmetic number, because the mean of its divisors is an integer number (11126808).

Almost surely, 2^66142371 is an apocalyptic number.

66142371 is a deficient number, since it is larger than the sum of its proper divisors (22872093).

66142371 is a wasteful number, since it uses less digits than its factorization.

66142371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206161.

The product of its digits is 6048, while the sum is 30.

The square root of 66142371 is about 8132.7960136721. The cubic root of 66142371 is about 404.4143768962.

The spelling of 66142371 in words is "sixty-six million, one hundred forty-two thousand, three hundred seventy-one".