65877813 has 8 divisors (see below), whose sum is σ = 97596800. Its totient is φ = 43918524.

The previous prime is 65877809. The next prime is 65877829. The reversal of 65877813 is 31877856.

It is not a de Polignac number, because 65877813 - 2² = 65877809 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 (65877803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1219933 + ... + 1219986.

It is an arithmetic number, because the mean of its divisors is an integer number (12199600).

Almost surely, 2^65877813 is an apocalyptic number.

It is an amenable number.

65877813 is a deficient number, since it is larger than the sum of its proper divisors (31718987).

65877813 is a wasteful number, since it uses less digits than its factorization.

65877813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439928 (or 2439922 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 65877813 is about 8116.5148308865. The cubic root of 65877813 is about 403.8744606344.

It can be divided in two parts, 6587 and 7813, that added together give a square (14400 = 120²).

The spelling of 65877813 in words is "sixty-five million, eight hundred seventy-seven thousand, eight hundred thirteen".