65988437 has 8 divisors (see below), whose sum is σ = 66732120. Its totient is φ = 65249280.

The previous prime is 65988401. The next prime is 65988457. The reversal of 65988437 is 73488956.

It can be written as a sum of positive squares in 4 ways, for example, as 556516 + 65431921 = 746^2 + 8089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65988437 - 2¹² = 65984341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65988457) 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, 33989 + ... + 35877.

It is an arithmetic number, because the mean of its divisors is an integer number (8341515).

Almost surely, 2^65988437 is an apocalyptic number.

It is an amenable number.

65988437 is a deficient number, since it is larger than the sum of its proper divisors (743683).

65988437 is a wasteful number, since it uses less digits than its factorization.

65988437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263.

The product of its digits is 1451520, while the sum is 50.

The square root of 65988437 is about 8123.3267200083. The cubic root of 65988437 is about 404.1004002503.

The spelling of 65988437 in words is "sixty-five million, nine hundred eighty-eight thousand, four hundred thirty-seven".