65622001 has 4 divisors (see below), whose sum is σ = 65766052. Its totient is φ = 65477952.

The previous prime is 65621981. The next prime is 65622019. The reversal of 65622001 is 10022656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24354225 + 41267776 = 4935^2 + 6424^2 .

It is a cyclic number.

It is not a de Polignac number, because 65622001 - 2⁹ = 65621489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65622301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71340 + ... + 72253.

It is an arithmetic number, because the mean of its divisors is an integer number (16441513).

Almost surely, 2^65622001 is an apocalyptic number.

It is an amenable number.

65622001 is a deficient number, since it is larger than the sum of its proper divisors (144051).

65622001 is a wasteful number, since it uses less digits than its factorization.

65622001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144050.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 65622001 is about 8100.7407685964. The cubic root of 65622001 is about 403.3510170665.

Adding to 65622001 its reverse (10022656), we get a palindrome (75644657).

The spelling of 65622001 in words is "sixty-five million, six hundred twenty-two thousand, one".