65466139 has 2 divisors, whose sum is σ = 65466140. Its totient is φ = 65466138.

The previous prime is 65466127. The next prime is 65466161. The reversal of 65466139 is 93166456.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65466139 is a prime.

It is not a weakly prime, because it can be changed into another prime (65466109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32733069 + 32733070.

It is an arithmetic number, because the mean of its divisors is an integer number (32733070).

Almost surely, 2^65466139 is an apocalyptic number.

65466139 is a deficient number, since it is larger than the sum of its proper divisors (1).

65466139 is an equidigital number, since it uses as much as digits as its factorization.

65466139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 65466139 is about 8091.1148181199. The cubic root of 65466139 is about 403.0314243794.

The spelling of 65466139 in words is "sixty-five million, four hundred sixty-six thousand, one hundred thirty-nine".