60661780 has 24 divisors (see below), whose sum is σ = 134884008. Its totient is φ = 22837248.

The previous prime is 60661771. The next prime is 60661781. The reversal of 60661780 is 8716606.

It can be written as a sum of positive squares in 4 ways, for example, as 1648656 + 59013124 = 1284^2 + 7682^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60661781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88869 + ... + 89548.

It is an arithmetic number, because the mean of its divisors is an integer number (5620167).

Almost surely, 2^60661780 is an apocalyptic number.

It is an amenable number.

60661780 is an abundant number, since it is smaller than the sum of its proper divisors (74222228).

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

60661780 is a wasteful number, since it uses less digits than its factorization.

60661780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178443 (or 178441 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 60661780 is about 7788.5672623404. The cubic root of 60661780 is about 392.9208273932.

The spelling of 60661780 in words is "sixty million, six hundred sixty-one thousand, seven hundred eighty".