67765420776761 has 4 divisors (see below), whose sum is σ = 67765917148800. Its totient is φ = 67764924404724.

The previous prime is 67765420776707. The next prime is 67765420776763. The reversal of 67765420776761 is 16767702456776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67765420776761 - 2¹⁰ = 67765420775737 is a prime.

It is a super-2 number, since 2×67765420776761² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67765420776763) 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, 247981181 + ... + 248254298.

It is an arithmetic number, because the mean of its divisors is an integer number (16941479287200).

Almost surely, 2^{67765420776761} is an apocalyptic number.

It is an amenable number.

67765420776761 is a deficient number, since it is larger than the sum of its proper divisors (496372039).

67765420776761 is a wasteful number, since it uses less digits than its factorization.

67765420776761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496372038.

The product of its (nonzero) digits is 871274880, while the sum is 71.

The spelling of 67765420776761 in words is "sixty-seven trillion, seven hundred sixty-five billion, four hundred twenty million, seven hundred seventy-six thousand, seven hundred sixty-one".