65650631 has 2 divisors, whose sum is σ = 65650632. Its totient is φ = 65650630.

The previous prime is 65650601. The next prime is 65650639. The reversal of 65650631 is 13605656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65650631 - 2¹⁰ = 65649607 is a prime.

It is a super-2 number, since 2×65650631² = 8620010701396322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65650639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32825315 + 32825316.

It is an arithmetic number, because the mean of its divisors is an integer number (32825316).

Almost surely, 2^65650631 is an apocalyptic number.

65650631 is a deficient number, since it is larger than the sum of its proper divisors (1).

65650631 is an equidigital number, since it uses as much as digits as its factorization.

65650631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 65650631 is about 8102.5076982376. The cubic root of 65650631 is about 403.4096674198.

The spelling of 65650631 in words is "sixty-five million, six hundred fifty thousand, six hundred thirty-one".