690348660 has 96 divisors (see below), whose sum is σ = 2082178560. Its totient is φ = 170335872.

The previous prime is 690348649. The next prime is 690348677. The reversal of 690348660 is 66843096.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41979 + ... + 56061.

It is an arithmetic number, because the mean of its divisors is an integer number (21689360).

Almost surely, 2^690348660 is an apocalyptic number.

690348660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690348660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041089280).

690348660 is an abundant number, since it is smaller than the sum of its proper divisors (1391829900).

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

690348660 is a wasteful number, since it uses less digits than its factorization.

690348660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14157 (or 14155 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 690348660 is about 26274.4868646373. The cubic root of 690348660 is about 883.8044055154.

The spelling of 690348660 in words is "six hundred ninety million, three hundred forty-eight thousand, six hundred sixty".