688168077 has 8 divisors (see below), whose sum is σ = 917708064. Its totient is φ = 458703408.

The previous prime is 688168037. The next prime is 688168081. The reversal of 688168077 is 770861886.

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

It is not a de Polignac number, because 688168077 - 2¹² = 688163981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688168037) 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, 7923 + ... + 37935.

It is an arithmetic number, because the mean of its divisors is an integer number (114713508).

Almost surely, 2^688168077 is an apocalyptic number.

It is an amenable number.

688168077 is a deficient number, since it is larger than the sum of its proper divisors (229539987).

688168077 is a wasteful number, since it uses less digits than its factorization.

688168077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37659.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 688168077 is about 26232.9578393288. The cubic root of 688168077 is about 882.8728754638.

The spelling of 688168077 in words is "six hundred eighty-eight million, one hundred sixty-eight thousand, seventy-seven".