60656640 has 176 divisors, whose sum is σ = 212232960. Its totient is φ = 14663680.

The previous prime is 60656639. The next prime is 60656693. The reversal of 60656640 is 4665606.

It is a tau number, because it is divible by the number of its divisors (176).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168781 + ... + 169139.

Almost surely, 2^60656640 is an apocalyptic number.

60656640 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 60656640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106116480).

60656640 is an abundant number, since it is smaller than the sum of its proper divisors (151576320).

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

60656640 is a wasteful number, since it uses less digits than its factorization.

60656640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 60656640 is about 7788.2372845208. The cubic root of 60656640 is about 392.9097294108.

It can be divided in two parts, 606566 and 40, that added together give a palindrome (606606).

The spelling of 60656640 in words is "sixty million, six hundred fifty-six thousand, six hundred forty".