66670142 has 16 divisors (see below), whose sum is σ = 124682112. Its totient is φ = 25975320.

The previous prime is 66670139. The next prime is 66670147. The reversal of 66670142 is 24107666.

It is a junction number, because it is equal to n+sod(n) for n = 66670099 and 66670108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66670147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216308 + ... + 216615.

It is an arithmetic number, because the mean of its divisors is an integer number (7792632).

Almost surely, 2^66670142 is an apocalyptic number.

66670142 is a deficient number, since it is larger than the sum of its proper divisors (58011970).

66670142 is a wasteful number, since it uses less digits than its factorization.

66670142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432943.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 66670142 is about 8165.1786263376. The cubic root of 66670142 is about 405.4871788089.

The spelling of 66670142 in words is "sixty-six million, six hundred seventy thousand, one hundred forty-two".