780669697471 has 4 divisors (see below), whose sum is σ = 780792431344. Its totient is φ = 780546963600.

The previous prime is 780669697463. The next prime is 780669697513. The reversal of 780669697471 is 174796966087.

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 780669697471 - 2³ = 780669697463 is a prime.

It is a super-3 number, since 3×780669697471³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 780669697471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780669697441) 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, 61357395 + ... + 61370116.

It is an arithmetic number, because the mean of its divisors is an integer number (195198107836).

Almost surely, 2^780669697471 is an apocalyptic number.

780669697471 is a deficient number, since it is larger than the sum of its proper divisors (122733873).

780669697471 is a wasteful number, since it uses less digits than its factorization.

780669697471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122733872.

The product of its (nonzero) digits is 192036096, while the sum is 70.

The spelling of 780669697471 in words is "seven hundred eighty billion, six hundred sixty-nine million, six hundred ninety-seven thousand, four hundred seventy-one".