61668408 has 32 divisors (see below), whose sum is σ = 156476160. Its totient is φ = 20248800.

The previous prime is 61668403. The next prime is 61668421. The reversal of 61668408 is 80486616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61668403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17568 + ... + 20783.

It is an arithmetic number, because the mean of its divisors is an integer number (4889880).

Almost surely, 2^61668408 is an apocalyptic number.

It is an amenable number.

61668408 is an abundant number, since it is smaller than the sum of its proper divisors (94807752).

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

61668408 is a wasteful number, since it uses less digits than its factorization.

61668408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38427 (or 38423 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 61668408 is about 7852.9235320357. The cubic root of 61668408 is about 395.0823051265.

The spelling of 61668408 in words is "sixty-one million, six hundred sixty-eight thousand, four hundred eight".