61969668 has 12 divisors (see below), whose sum is σ = 144595920. Its totient is φ = 20656552.

The previous prime is 61969643. The next prime is 61969703. The reversal of 61969668 is 86696916.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 61969668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2582058 + ... + 2582081.

It is an arithmetic number, because the mean of its divisors is an integer number (12049660).

Almost surely, 2^61969668 is an apocalyptic number.

It is an amenable number.

61969668 is an abundant number, since it is smaller than the sum of its proper divisors (82626252).

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

61969668 is a wasteful number, since it uses less digits than its factorization.

61969668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164146 (or 5164144 counting only the distinct ones).

The product of its digits is 839808, while the sum is 51.

The square root of 61969668 is about 7872.0815544556. The cubic root of 61969668 is about 395.7246070159.

The spelling of 61969668 in words is "sixty-one million, nine hundred sixty-nine thousand, six hundred sixty-eight".