690660068 has 24 divisors (see below), whose sum is σ = 1393550592. Its totient is φ = 293376384.

The previous prime is 690660059. The next prime is 690660083. The reversal of 690660068 is 860066096.

It is a super-2 number, since 2×690660068² = 954022659059529248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105980 + ... + 112307.

It is an arithmetic number, because the mean of its divisors is an integer number (58064608).

Almost surely, 2^690660068 is an apocalyptic number.

It is an amenable number.

690660068 is an abundant number, since it is smaller than the sum of its proper divisors (702890524).

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

690660068 is a wasteful number, since it uses less digits than its factorization.

690660068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218411 (or 218409 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 690660068 is about 26280.4122494302. The cubic root of 690660068 is about 883.9372767273.

The spelling of 690660068 in words is "six hundred ninety million, six hundred sixty thousand, sixty-eight".