690603660 has 72 divisors (see below), whose sum is σ = 2115627696. Its totient is φ = 182332800.

The previous prime is 690603533. The next prime is 690603677. The reversal of 690603660 is 66306096.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 814 + ... + 37173.

It is an arithmetic number, because the mean of its divisors is an integer number (29383718).

Almost surely, 2^690603660 is an apocalyptic number.

690603660 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 690603660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1057813848).

690603660 is an abundant number, since it is smaller than the sum of its proper divisors (1425024036).

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

690603660 is a wasteful number, since it uses less digits than its factorization.

690603660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38103 (or 38098 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 690603660 is about 26279.3390327839. The cubic root of 690603660 is about 883.9132115884.

It can be divided in two parts, 6906036 and 60, that added together give a palindrome (6906096).

The spelling of 690603660 in words is "six hundred ninety million, six hundred three thousand, six hundred sixty".