61665982 has 16 divisors (see below), whose sum is σ = 111277440. Its totient is φ = 25037208.

The previous prime is 61665979. The next prime is 61665991. The reversal of 61665982 is 28956616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115648 + ... + 116179.

It is an arithmetic number, because the mean of its divisors is an integer number (6954840).

Almost surely, 2^61665982 is an apocalyptic number.

61665982 is a deficient number, since it is larger than the sum of its proper divisors (49611458).

61665982 is a wasteful number, since it uses less digits than its factorization.

61665982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231855.

The product of its digits is 155520, while the sum is 43.

The square root of 61665982 is about 7852.7690657500. The cubic root of 61665982 is about 395.0771242877.

The spelling of 61665982 in words is "sixty-one million, six hundred sixty-five thousand, nine hundred eighty-two".