61665996 has 48 divisors (see below), whose sum is σ = 166912256. Its totient is φ = 17354304.

The previous prime is 61665991. The next prime is 61666019. The reversal of 61665996 is 69956616.

It is not an unprimeable number, because it can be changed into a prime (61665991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150 + ... + 11106.

Almost surely, 2^61665996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61665996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83456128).

61665996 is an abundant number, since it is smaller than the sum of its proper divisors (105246260).

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

61665996 is a wasteful number, since it uses less digits than its factorization.

61665996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038 (or 11036 counting only the distinct ones).

The product of its digits is 524880, while the sum is 48.

The square root of 61665996 is about 7852.7699571552. The cubic root of 61665996 is about 395.0771541858.

The spelling of 61665996 in words is "sixty-one million, six hundred sixty-five thousand, nine hundred ninety-six".