65040626687 has 4 divisors (see below), whose sum is σ = 66424469856. Its totient is φ = 63656783520.

The previous prime is 65040626657. The next prime is 65040626731. The reversal of 65040626687 is 78662604056.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65040626687 - 2¹⁴ = 65040610303 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 (65040626647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691921514 + ... + 691921607.

It is an arithmetic number, because the mean of its divisors is an integer number (16606117464).

Almost surely, 2^65040626687 is an apocalyptic number.

65040626687 is a deficient number, since it is larger than the sum of its proper divisors (1383843169).

65040626687 is a wasteful number, since it uses less digits than its factorization.

65040626687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383843168.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 65040626687 in words is "sixty-five billion, forty million, six hundred twenty-six thousand, six hundred eighty-seven".