65881895 has 4 divisors (see below), whose sum is σ = 79058280. Its totient is φ = 52705512.

The previous prime is 65881883. The next prime is 65881897. The reversal of 65881895 is 59818856.

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 65881895 - 2¹⁴ = 65865511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65881897) 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, 6588185 + ... + 6588194.

It is an arithmetic number, because the mean of its divisors is an integer number (19764570).

Almost surely, 2^65881895 is an apocalyptic number.

65881895 is a deficient number, since it is larger than the sum of its proper divisors (13176385).

65881895 is a wasteful number, since it uses less digits than its factorization.

65881895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13176384.

The product of its digits is 691200, while the sum is 50.

The square root of 65881895 is about 8116.7662896008. The cubic root of 65881895 is about 403.8828022465.

The spelling of 65881895 in words is "sixty-five million, eight hundred eighty-one thousand, eight hundred ninety-five".