65997142 has 4 divisors (see below), whose sum is σ = 98995716. Its totient is φ = 32998570.

The previous prime is 65997133. The next prime is 65997157. The reversal of 65997142 is 24179956.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16499284 + ... + 16499287.

It is an arithmetic number, because the mean of its divisors is an integer number (24748929).

Almost surely, 2^65997142 is an apocalyptic number.

65997142 is a deficient number, since it is larger than the sum of its proper divisors (32998574).

65997142 is a wasteful number, since it uses less digits than its factorization.

65997142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32998573.

The product of its digits is 136080, while the sum is 43.

The square root of 65997142 is about 8123.8625049911. The cubic root of 65997142 is about 404.1181687134.

The spelling of 65997142 in words is "sixty-five million, nine hundred ninety-seven thousand, one hundred forty-two".