61661842 has 24 divisors (see below), whose sum is σ = 103210128. Its totient is φ = 27602520.

The previous prime is 61661777. The next prime is 61661857. The reversal of 61661842 is 24816616.

61661842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61661798 and 61661807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14313 + ... + 18115.

It is an arithmetic number, because the mean of its divisors is an integer number (4300422).

Almost surely, 2^61661842 is an apocalyptic number.

61661842 is a deficient number, since it is larger than the sum of its proper divisors (41548286).

61661842 is a wasteful number, since it uses less digits than its factorization.

61661842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894 (or 3883 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 61661842 is about 7852.5054600427. The cubic root of 61661842 is about 395.0682828063.

It can be divided in two parts, 6166 and 1842, that added together give a palindrome (8008).

The spelling of 61661842 in words is "sixty-one million, six hundred sixty-one thousand, eight hundred forty-two".