65399641 has 2 divisors, whose sum is σ = 65399642. Its totient is φ = 65399640.

The previous prime is 65399627. The next prime is 65399681. The reversal of 65399641 is 14699356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35105625 + 30294016 = 5925^2 + 5504^2 .

It is a cyclic number.

It is not a de Polignac number, because 65399641 - 2¹¹ = 65397593 is a prime.

It is a super-2 number, since 2×65399641² = 8554226085857762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65399681) 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 as a sum of consecutive naturals, namely, 32699820 + 32699821.

It is an arithmetic number, because the mean of its divisors is an integer number (32699821).

Almost surely, 2^65399641 is an apocalyptic number.

It is an amenable number.

65399641 is a deficient number, since it is larger than the sum of its proper divisors (1).

65399641 is an equidigital number, since it uses as much as digits as its factorization.

65399641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 43.

The square root of 65399641 is about 8087.0044515877. The cubic root of 65399641 is about 402.8949168474.

The spelling of 65399641 in words is "sixty-five million, three hundred ninety-nine thousand, six hundred forty-one".