688660704467 has 4 divisors (see below), whose sum is σ = 693221371536. Its totient is φ = 684100037400.

The previous prime is 688660704463. The next prime is 688660704469. The reversal of 688660704467 is 764407066886.

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 688660704467 - 2² = 688660704463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688660704463) 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, 2280333308 + ... + 2280333609.

It is an arithmetic number, because the mean of its divisors is an integer number (173305342884).

Almost surely, 2^688660704467 is an apocalyptic number.

688660704467 is a deficient number, since it is larger than the sum of its proper divisors (4560667069).

688660704467 is a wasteful number, since it uses less digits than its factorization.

688660704467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560667068.

The product of its (nonzero) digits is 65028096, while the sum is 62.

The spelling of 688660704467 in words is "six hundred eighty-eight billion, six hundred sixty million, seven hundred four thousand, four hundred sixty-seven".