65000557 has 4 divisors (see below), whose sum is σ = 65119936. Its totient is φ = 64881180.

The previous prime is 65000549. The next prime is 65000561. The reversal of 65000557 is 75500056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65000557 - 2³ = 65000549 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 (65000567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58869 + ... + 59962.

It is an arithmetic number, because the mean of its divisors is an integer number (16279984).

Almost surely, 2^65000557 is an apocalyptic number.

It is an amenable number.

65000557 is a deficient number, since it is larger than the sum of its proper divisors (119379).

65000557 is a wasteful number, since it uses less digits than its factorization.

65000557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119378.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 65000557 is about 8062.2922918981. The cubic root of 65000557 is about 402.0737243399.

The spelling of 65000557 in words is "sixty-five million, five hundred fifty-seven", and thus it is an aban number.