65464991 has 2 divisors, whose sum is σ = 65464992. Its totient is φ = 65464990.

The previous prime is 65464981. The next prime is 65465027. The reversal of 65464991 is 19946456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65464991 - 2¹⁰ = 65463967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65464981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32732495 + 32732496.

It is an arithmetic number, because the mean of its divisors is an integer number (32732496).

Almost surely, 2^65464991 is an apocalyptic number.

65464991 is a deficient number, since it is larger than the sum of its proper divisors (1).

65464991 is an equidigital number, since it uses as much as digits as its factorization.

65464991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 65464991 is about 8091.0438757925. The cubic root of 65464991 is about 403.0290685418.

The spelling of 65464991 in words is "sixty-five million, four hundred sixty-four thousand, nine hundred ninety-one".