60660660 has 96 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 15296512.

The previous prime is 60660653. The next prime is 60660667. The reversal of 60660660 is 6606606.

60660660 = 1613² + 1614² + ... + 1635².

It is an interprime number because it is at equal distance from previous prime (60660653) and next prime (60660667).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60660667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155746 + ... + 156134.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^60660660 is an apocalyptic number.

60660660 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 60660660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89631360).

60660660 is an abundant number, since it is smaller than the sum of its proper divisors (118602060).

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

60660660 is a wasteful number, since it uses less digits than its factorization.

60660660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 60660660 is about 7788.4953617499. The cubic root of 60660660 is about 392.9184092092.

The spelling of 60660660 in words is "sixty million, six hundred sixty thousand, six hundred sixty".