61121670 has 64 divisors (see below), whose sum is σ = 155623680. Its totient is φ = 15320448.

The previous prime is 61121663. The next prime is 61121707. The reversal of 61121670 is 7612116.

It is a self number, because there is not a number n which added to its sum of digits gives 61121670.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 89149 + ... + 89831.

It is an arithmetic number, because the mean of its divisors is an integer number (2431620).

Almost surely, 2^61121670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61121670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77811840).

61121670 is an abundant number, since it is smaller than the sum of its proper divisors (94502010).

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

61121670 is a wasteful number, since it uses less digits than its factorization.

61121670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 61121670 is about 7818.0349193387. The cubic root of 61121670 is about 393.9112677779.

Adding to 61121670 its reverse (7612116), we get a palindrome (68733786).

The spelling of 61121670 in words is "sixty-one million, one hundred twenty-one thousand, six hundred seventy".