67735920961 has 4 divisors (see below), whose sum is σ = 67761767124. Its totient is φ = 67710074800.

The previous prime is 67735920947. The next prime is 67735920991. The reversal of 67735920961 is 16902953776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54931640625 + 12804280336 = 234375^2 + 113156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67735920961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67735920991) 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, 12919150 + ... + 12924391.

It is an arithmetic number, because the mean of its divisors is an integer number (16940441781).

Almost surely, 2^67735920961 is an apocalyptic number.

It is an amenable number.

67735920961 is a deficient number, since it is larger than the sum of its proper divisors (25846163).

67735920961 is a wasteful number, since it uses less digits than its factorization.

67735920961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25846162.

The product of its (nonzero) digits is 4286520, while the sum is 55.

The spelling of 67735920961 in words is "sixty-seven billion, seven hundred thirty-five million, nine hundred twenty thousand, nine hundred sixty-one".