61517668 has 12 divisors (see below), whose sum is σ = 113322160. Its totient is φ = 29139912.

The previous prime is 61517653. The next prime is 61517699. The reversal of 61517668 is 86671516.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61517668.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404646 + ... + 404797.

Almost surely, 2^61517668 is an apocalyptic number.

It is an amenable number.

61517668 is a deficient number, since it is larger than the sum of its proper divisors (51804492).

61517668 is a wasteful number, since it uses less digits than its factorization.

61517668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809466 (or 809464 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 61517668 is about 7843.3199603229. The cubic root of 61517668 is about 394.7601342395.

The spelling of 61517668 in words is "sixty-one million, five hundred seventeen thousand, six hundred sixty-eight".