61766244 has 18 divisors (see below), whose sum is σ = 156131430. Its totient is φ = 20588736.

The previous prime is 61766239. The next prime is 61766261. The reversal of 61766244 is 44266716.

It can be written as a sum of positive squares in only one way, i.e., 56430144 + 5336100 = 7512^2 + 2310^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1715729 = 61766244 / (6 + 1 + 7 + 6 + 6 + 2 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 61766199 and 61766208.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 857829 + ... + 857900.

Almost surely, 2^61766244 is an apocalyptic number.

It is an amenable number.

61766244 is an abundant number, since it is smaller than the sum of its proper divisors (94365186).

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

61766244 is a wasteful number, since it uses less digits than its factorization.

61766244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715739 (or 1715734 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 61766244 is about 7859.1503357551. The cubic root of 61766244 is about 395.2911254432.

The spelling of 61766244 in words is "sixty-one million, seven hundred sixty-six thousand, two hundred forty-four".