65501899 has 2 divisors, whose sum is σ = 65501900. Its totient is φ = 65501898.

The previous prime is 65501881. The next prime is 65501927. The reversal of 65501899 is 99810556.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65501899 - 2²³ = 57113291 is a prime.

It is not a weakly prime, because it can be changed into another prime (65501819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32750949 + 32750950.

It is an arithmetic number, because the mean of its divisors is an integer number (32750950).

Almost surely, 2^65501899 is an apocalyptic number.

65501899 is a deficient number, since it is larger than the sum of its proper divisors (1).

65501899 is an equidigital number, since it uses as much as digits as its factorization.

65501899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 65501899 is about 8093.3243478808. The cubic root of 65501899 is about 403.1047945244.

The spelling of 65501899 in words is "sixty-five million, five hundred one thousand, eight hundred ninety-nine".