61680051 has 6 divisors (see below), whose sum is σ = 89093420. Its totient is φ = 41120028.

The previous prime is 61680019. The next prime is 61680053. The reversal of 61680051 is 15008616.

It is not a de Polignac number, because 61680051 - 2⁵ = 61680019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61679997 and 61680024.

It is not an unprimeable number, because it can be changed into a prime (61680053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3426661 + ... + 3426678.

Almost surely, 2^61680051 is an apocalyptic number.

61680051 is a deficient number, since it is larger than the sum of its proper divisors (27413369).

61680051 is a wasteful number, since it uses less digits than its factorization.

61680051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6853345 (or 6853342 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 61680051 is about 7853.6648133212. The cubic root of 61680051 is about 395.1071674181.

Adding to 61680051 its reverse (15008616), we get a palindrome (76688667).

The spelling of 61680051 in words is "sixty-one million, six hundred eighty thousand, fifty-one".