65312761 has 8 divisors (see below), whose sum is σ = 67047048. Its totient is φ = 63600000.

The previous prime is 65312717. The next prime is 65312773. The reversal of 65312761 is 16721356.

It can be written as a sum of positive squares in 4 ways, for example, as 19669225 + 45643536 = 4435^2 + 6756^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65312761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65312701) 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, 861 + ... + 11461.

It is an arithmetic number, because the mean of its divisors is an integer number (8380881).

Almost surely, 2^65312761 is an apocalyptic number.

65312761 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

65312761 is a deficient number, since it is larger than the sum of its proper divisors (1734287).

65312761 is a wasteful number, since it uses less digits than its factorization.

65312761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10763.

The product of its digits is 7560, while the sum is 31.

The square root of 65312761 is about 8081.6310853688. The cubic root of 65312761 is about 402.7164295173.

The spelling of 65312761 in words is "sixty-five million, three hundred twelve thousand, seven hundred sixty-one".