66870143 has 16 divisors (see below), whose sum is σ = 71746560. Its totient is φ = 62210400.

The previous prime is 66870127. The next prime is 66870149. The reversal of 66870143 is 34107866.

It is a cyclic number.

It is not a de Polignac number, because 66870143 - 2⁴ = 66870127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66870149) 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, 96428 + ... + 97118.

It is an arithmetic number, because the mean of its divisors is an integer number (4484160).

Almost surely, 2^66870143 is an apocalyptic number.

66870143 is a deficient number, since it is larger than the sum of its proper divisors (4876417).

66870143 is a wasteful number, since it uses less digits than its factorization.

66870143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 66870143 is about 8177.4166458607. The cubic root of 66870143 is about 405.8922421035.

The spelling of 66870143 in words is "sixty-six million, eight hundred seventy thousand, one hundred forty-three".