65987375 has 16 divisors (see below), whose sum is σ = 85013760. Its totient is φ = 51084000.

The previous prime is 65987371. The next prime is 65987381. The reversal of 65987375 is 57378956.

65987375 = 1001² + 1002² + ... + 1062².

It is a happy number.

It is not a de Polignac number, because 65987375 - 2² = 65987371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65987371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4640 + ... + 12389.

It is an arithmetic number, because the mean of its divisors is an integer number (5313360).

Almost surely, 2^65987375 is an apocalyptic number.

65987375 is a deficient number, since it is larger than the sum of its proper divisors (19026385).

65987375 is a wasteful number, since it uses less digits than its factorization.

65987375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17075 (or 17065 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 50.

The square root of 65987375 is about 8123.2613524372. The cubic root of 65987375 is about 404.0982324113.

The spelling of 65987375 in words is "sixty-five million, nine hundred eighty-seven thousand, three hundred seventy-five".