662731020 has 432 divisors, whose sum is σ = 2556223488. Its totient is φ = 135924480.

The previous prime is 662730967. The next prime is 662731021. The reversal of 662731020 is 20137266.

It is a happy number.

662731020 is a `hidden beast` number, since 6 + 627 + 3 + 10 + 20 = 666.

It is not an unprimeable number, because it can be changed into a prime (662731021) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14100637 + ... + 14100683.

It is an arithmetic number, because the mean of its divisors is an integer number (5917184).

Almost surely, 2^662731020 is an apocalyptic number.

662731020 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 662731020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278111744).

662731020 is an abundant number, since it is smaller than the sum of its proper divisors (1893492468).

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

662731020 is a wasteful number, since it uses less digits than its factorization.

662731020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 662731020 is about 25743.5626905058. The cubic root of 662731020 is about 871.8580187852.

Adding to 662731020 its reverse (20137266), we get a palindrome (682868286).

The spelling of 662731020 in words is "six hundred sixty-two million, seven hundred thirty-one thousand, twenty".