65956716437 has 4 divisors (see below), whose sum is σ = 65957758080. Its totient is φ = 65955674796.

The previous prime is 65956716421. The next prime is 65956716439. The reversal of 65956716437 is 73461765956.

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 65956716437 - 2⁴ = 65956716421 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 (65956716439) 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, 419237 + ... + 554682.

It is an arithmetic number, because the mean of its divisors is an integer number (16489439520).

Almost surely, 2^65956716437 is an apocalyptic number.

It is an amenable number.

65956716437 is a deficient number, since it is larger than the sum of its proper divisors (1041643).

65956716437 is an equidigital number, since it uses as much as digits as its factorization.

65956716437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041642.

The product of its digits is 28576800, while the sum is 59.

The spelling of 65956716437 in words is "sixty-five billion, nine hundred fifty-six million, seven hundred sixteen thousand, four hundred thirty-seven".