65670001 has 2 divisors, whose sum is σ = 65670002. Its totient is φ = 65670000.

The previous prime is 65669999. The next prime is 65670013. The reversal of 65670001 is 10007656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64786401 + 883600 = 8049^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 65670001 - 2¹ = 65669999 is a prime.

Together with 65669999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65670071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32835000 + 32835001.

It is an arithmetic number, because the mean of its divisors is an integer number (32835001).

Almost surely, 2^65670001 is an apocalyptic number.

It is an amenable number.

65670001 is a deficient number, since it is larger than the sum of its proper divisors (1).

65670001 is an equidigital number, since it uses as much as digits as its factorization.

65670001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 65670001 is about 8103.7029190365. The cubic root of 65670001 is about 403.4493384113.

Adding to 65670001 its reverse (10007656), we get a palindrome (75677657).

The spelling of 65670001 in words is "sixty-five million, six hundred seventy thousand, one".