65550001 has 8 divisors (see below), whose sum is σ = 71697600. Its totient is φ = 59433840.

The previous prime is 65549993. The next prime is 65550031. The reversal of 65550001 is 10005556.

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 65550001 - 2³ = 65549993 is a prime.

It is a super-2 number, since 2×65550001² = 8593605262200002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65550031) 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, 3381 + ... + 11938.

It is an arithmetic number, because the mean of its divisors is an integer number (8962200).

Almost surely, 2^65550001 is an apocalyptic number.

It is an amenable number.

65550001 is a deficient number, since it is larger than the sum of its proper divisors (6147599).

65550001 is a wasteful number, since it uses less digits than its factorization.

65550001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15719.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 65550001 is about 8096.2955109111. The cubic root of 65550001 is about 403.2034451112.

Adding to 65550001 its reverse (10005556), we get a palindrome (75555557).

The spelling of 65550001 in words is "sixty-five million, five hundred fifty thousand, one".