65940718457 has 8 divisors (see below), whose sum is σ = 68817677760. Its totient is φ = 63064590160.

The previous prime is 65940718429. The next prime is 65940718471. The reversal of 65940718457 is 75481704956.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65940718457 - 2¹⁰ = 65940717433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65940718427) 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, 42794 + ... + 365667.

It is an arithmetic number, because the mean of its divisors is an integer number (8602209720).

Almost surely, 2^65940718457 is an apocalyptic number.

It is an amenable number.

65940718457 is a deficient number, since it is larger than the sum of its proper divisors (2876959303).

65940718457 is a wasteful number, since it uses less digits than its factorization.

65940718457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415503.

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 65940718457 in words is "sixty-five billion, nine hundred forty million, seven hundred eighteen thousand, four hundred fifty-seven".