683661420 has 144 divisors (see below), whose sum is σ = 2350988640. Its totient is φ = 159418368.

The previous prime is 683661403. The next prime is 683661487. The reversal of 683661420 is 24166386.

683661420 is a `hidden beast` number, since 6 + 8 + 36 + 614 + 2 + 0 = 666.

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 (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36772 + ... + 52148.

It is an arithmetic number, because the mean of its divisors is an integer number (16326310).

Almost surely, 2^683661420 is an apocalyptic number.

683661420 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 683661420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175494320).

683661420 is an abundant number, since it is smaller than the sum of its proper divisors (1667327220).

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

683661420 is a wasteful number, since it uses less digits than its factorization.

683661420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15424 (or 15419 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 683661420 is about 26146.9198950852. The cubic root of 683661420 is about 880.9414081730.

The spelling of 683661420 in words is "six hundred eighty-three million, six hundred sixty-one thousand, four hundred twenty".