65701665139 has 4 divisors (see below), whose sum is σ = 71674543800. Its totient is φ = 59728786480.

The previous prime is 65701665137. The next prime is 65701665181. The reversal of 65701665139 is 93156610756.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65701665139 - 2¹ = 65701665137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65701665092 and 65701665101.

It is not an unprimeable number, because it can be changed into a prime (65701665137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2986439314 + ... + 2986439335.

It is an arithmetic number, because the mean of its divisors is an integer number (17918635950).

Almost surely, 2^65701665139 is an apocalyptic number.

65701665139 is a deficient number, since it is larger than the sum of its proper divisors (5972878661).

65701665139 is a wasteful number, since it uses less digits than its factorization.

65701665139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5972878660.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 65701665139 in words is "sixty-five billion, seven hundred one million, six hundred sixty-five thousand, one hundred thirty-nine".