65820761247 has 8 divisors (see below), whose sum is σ = 88871914240. Its totient is φ = 43325057880.

The previous prime is 65820761239. The next prime is 65820761273. The reversal of 65820761247 is 74216702856.

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

It is not a de Polignac number, because 65820761247 - 2³ = 65820761239 is a prime.

It is a super-2 number, since 2×65820761247² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65820761196 and 65820761205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65820761287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138862129 + ... + 138862602.

It is an arithmetic number, because the mean of its divisors is an integer number (11108989280).

Almost surely, 2^65820761247 is an apocalyptic number.

65820761247 is a deficient number, since it is larger than the sum of its proper divisors (23051152993).

65820761247 is a wasteful number, since it uses less digits than its factorization.

65820761247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277724813.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 65820761247 in words is "sixty-five billion, eight hundred twenty million, seven hundred sixty-one thousand, two hundred forty-seven".