61166420 has 48 divisors (see below), whose sum is σ = 147329280. Its totient is φ = 20895744.

The previous prime is 61166401. The next prime is 61166449. The reversal of 61166420 is 2466116.

It is a happy number.

61166420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61166420.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 49652 + ... + 50868.

It is an arithmetic number, because the mean of its divisors is an integer number (3069360).

Almost surely, 2^61166420 is an apocalyptic number.

It is an amenable number.

61166420 is an abundant number, since it is smaller than the sum of its proper divisors (86162860).

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

61166420 is a wasteful number, since it uses less digits than its factorization.

61166420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592 (or 1590 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 61166420 is about 7820.8963680642. The cubic root of 61166420 is about 394.0073778755.

The spelling of 61166420 in words is "sixty-one million, one hundred sixty-six thousand, four hundred twenty".