697660 has 12 divisors (see below), whose sum is σ = 1465128. Its totient is φ = 279056.

The previous prime is 697643. The next prime is 697673. The reversal of 697660 is 66796.

697660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17422 + ... + 17461.

It is an arithmetic number, because the mean of its divisors is an integer number (122094).

2⁶⁹⁷⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

697660 is an abundant number, since it is smaller than the sum of its proper divisors (767468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697660 is a wasteful number, since it uses less digits than its factorization.

697660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34892 (or 34890 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 697660 is about 835.2604384262. The cubic root of 697660 is about 88.6913518495.

The spelling of 697660 in words is "six hundred ninety-seven thousand, six hundred sixty".