61669604 has 6 divisors (see below), whose sum is σ = 107921814. Its totient is φ = 30834800.

The previous prime is 61669589. The next prime is 61669607. The reversal of 61669604 is 40696616.

It can be written as a sum of positive squares in only one way, i.e., 45589504 + 16080100 = 6752^2 + 4010^2 .

It is not an unprimeable number, because it can be changed into a prime (61669607) by changing a digit.

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 as a sum of consecutive naturals, namely, 7708697 + ... + 7708704.

It is an arithmetic number, because the mean of its divisors is an integer number (17986969).

Almost surely, 2^61669604 is an apocalyptic number.

It is an amenable number.

61669604 is a deficient number, since it is larger than the sum of its proper divisors (46252210).

61669604 is a wasteful number, since it uses less digits than its factorization.

61669604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15417405 (or 15417403 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 61669604 is about 7852.9996816503. Note that the first 3 decimals coincide. The cubic root of 61669604 is about 395.0848591916.

The spelling of 61669604 in words is "sixty-one million, six hundred sixty-nine thousand, six hundred four".