65550997 has 8 divisors (see below), whose sum is σ = 69477912. Its totient is φ = 61632000.

The previous prime is 65550977. The next prime is 65551033. The reversal of 65550997 is 79905556.

It can be written as a sum of positive squares in 4 ways, for example, as 21911761 + 43639236 = 4681^2 + 6606^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65550997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65550917) 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, 29547 + ... + 31687.

It is an arithmetic number, because the mean of its divisors is an integer number (8684739).

Almost surely, 2^65550997 is an apocalyptic number.

It is an amenable number.

65550997 is a deficient number, since it is larger than the sum of its proper divisors (3926915).

65550997 is a wasteful number, since it uses less digits than its factorization.

65550997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959.

The product of its (nonzero) digits is 425250, while the sum is 46.

The square root of 65550997 is about 8096.3570202901. The cubic root of 65550997 is about 403.2054872601.

The spelling of 65550997 in words is "sixty-five million, five hundred fifty thousand, nine hundred ninety-seven".