61012660 has 48 divisors (see below), whose sum is σ = 136745280. Its totient is φ = 22786560.

The previous prime is 61012639. The next prime is 61012739. The reversal of 61012660 is 6621016.

It is a congruent number.

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, 46615 + ... + 47905.

It is an arithmetic number, because the mean of its divisors is an integer number (2848860).

Almost surely, 2^61012660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61012660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68372640).

61012660 is an abundant number, since it is smaller than the sum of its proper divisors (75732620).

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

61012660 is a wasteful number, since it uses less digits than its factorization.

61012660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456 (or 1454 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 61012660 is about 7811.0601073094. The cubic root of 61012660 is about 393.6769492430.

Adding to 61012660 its reverse (6621016), we get a palindrome (67633676).

The spelling of 61012660 in words is "sixty-one million, twelve thousand, six hundred sixty".