61661763 has 16 divisors (see below), whose sum is σ = 91831840. Its totient is φ = 40891392.

The previous prime is 61661731. The next prime is 61661773. The reversal of 61661763 is 36716616.

61661763 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61661763 - 2⁵ = 61661731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61661723) by changing a digit.

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, 706 + ... + 11127.

It is an arithmetic number, because the mean of its divisors is an integer number (5739490).

Almost surely, 2^61661763 is an apocalyptic number.

61661763 is a deficient number, since it is larger than the sum of its proper divisors (30170077).

61661763 is a wasteful number, since it uses less digits than its factorization.

61661763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12035 (or 12029 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 61661763 is about 7852.5004297994. The cubic root of 61661763 is about 395.0681140882.

The spelling of 61661763 in words is "sixty-one million, six hundred sixty-one thousand, seven hundred sixty-three".