65919071 has 4 divisors (see below), whose sum is σ = 66085512. Its totient is φ = 65752632.

The previous prime is 65919067. The next prime is 65919083. The reversal of 65919071 is 17091956.

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

It is a cyclic number.

It is not a de Polignac number, because 65919071 - 2² = 65919067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65919011) 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, 82625 + ... + 83418.

It is an arithmetic number, because the mean of its divisors is an integer number (16521378).

Almost surely, 2^65919071 is an apocalyptic number.

65919071 is a deficient number, since it is larger than the sum of its proper divisors (166441).

65919071 is a wasteful number, since it uses less digits than its factorization.

65919071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166440.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 65919071 is about 8119.0560411910. The cubic root of 65919071 is about 403.9587559601.

The spelling of 65919071 in words is "sixty-five million, nine hundred nineteen thousand, seventy-one".