65660142 has 16 divisors (see below), whose sum is σ = 133120080. Its totient is φ = 21586752.

The previous prime is 65660123. The next prime is 65660167. The reversal of 65660142 is 24106656.

It is a super-2 number, since 2×65660142² = 8622508494920328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 74517 + ... + 75392.

It is an arithmetic number, because the mean of its divisors is an integer number (8320005).

Almost surely, 2^65660142 is an apocalyptic number.

65660142 is an abundant number, since it is smaller than the sum of its proper divisors (67459938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65660142 is a wasteful number, since it uses less digits than its factorization.

65660142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149987.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 65660142 is about 8103.0945940425. The cubic root of 65660142 is about 403.4291475274.

Adding to 65660142 its reverse (24106656), we get a palindrome (89766798).

The spelling of 65660142 in words is "sixty-five million, six hundred sixty thousand, one hundred forty-two".