60661020 has 144 divisors (see below), whose sum is σ = 202245120. Its totient is φ = 13539456.

The previous prime is 60661009. The next prime is 60661033. The reversal of 60661020 is 2016606.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137961 + ... + 138399.

It is an arithmetic number, because the mean of its divisors is an integer number (1404480).

Almost surely, 2^60661020 is an apocalyptic number.

60661020 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 60661020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101122560).

60661020 is an abundant number, since it is smaller than the sum of its proper divisors (141584100).

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

60661020 is a wasteful number, since it uses less digits than its factorization.

60661020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 60661020 is about 7788.5184727264. The cubic root of 60661020 is about 392.9191864859.

Adding to 60661020 its reverse (2016606), we get a palindrome (62677626).

The spelling of 60661020 in words is "sixty million, six hundred sixty-one thousand, twenty".