65951623 has 2 divisors, whose sum is σ = 65951624. Its totient is φ = 65951622.

The previous prime is 65951617. The next prime is 65951629. The reversal of 65951623 is 32615956.

It is a balanced prime because it is at equal distance from previous prime (65951617) and next prime (65951629).

It is a cyclic number.

It is not a de Polignac number, because 65951623 - 2⁵ = 65951591 is a prime.

It is a super-4 number, since 4×65951623⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65951629) 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, 32975811 + 32975812.

It is an arithmetic number, because the mean of its divisors is an integer number (32975812).

Almost surely, 2^65951623 is an apocalyptic number.

65951623 is a deficient number, since it is larger than the sum of its proper divisors (1).

65951623 is an equidigital number, since it uses as much as digits as its factorization.

65951623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 37.

The square root of 65951623 is about 8121.0604603094. The cubic root of 65951623 is about 404.0252390042.

The spelling of 65951623 in words is "sixty-five million, nine hundred fifty-one thousand, six hundred twenty-three".