66572143 has 24 divisors (see below), whose sum is σ = 80438400. Its totient is φ = 54798480.

The previous prime is 66572141. The next prime is 66572171. The reversal of 66572143 is 34127566.

It is a happy number.

It is not a de Polignac number, because 66572143 - 2¹ = 66572141 is a prime.

It is a super-2 number, since 2×66572143² = 8863700447224898, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66572099 and 66572108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66572141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52248 + ... + 53506.

It is an arithmetic number, because the mean of its divisors is an integer number (3351600).

Almost surely, 2^66572143 is an apocalyptic number.

66572143 is a deficient number, since it is larger than the sum of its proper divisors (13866257).

66572143 is a wasteful number, since it uses less digits than its factorization.

66572143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323 (or 1312 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 66572143 is about 8159.1753872557. The cubic root of 66572143 is about 405.2884050508.

The spelling of 66572143 in words is "sixty-six million, five hundred seventy-two thousand, one hundred forty-three".