66717142 has 16 divisors (see below), whose sum is σ = 104725872. Its totient is φ = 31842720.

The previous prime is 66717137. The next prime is 66717149. The reversal of 66717142 is 24171766.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66717098 and 66717107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66717149) 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, 4584 + ... + 12427.

It is an arithmetic number, because the mean of its divisors is an integer number (6545367).

Almost surely, 2^66717142 is an apocalyptic number.

66717142 is a deficient number, since it is larger than the sum of its proper divisors (38008730).

66717142 is a wasteful number, since it uses less digits than its factorization.

66717142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17103.

The product of its digits is 14112, while the sum is 34.

The square root of 66717142 is about 8168.0561947136. The cubic root of 66717142 is about 405.5824409468.

The spelling of 66717142 in words is "sixty-six million, seven hundred seventeen thousand, one hundred forty-two".