61670447 has 8 divisors (see below), whose sum is σ = 65228160. Its totient is φ = 58143960.

The previous prime is 61670417. The next prime is 61670459. The reversal of 61670447 is 74407616.

It is a happy number.

61670447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61670447 - 2¹² = 61666351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61670417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3683 + ... + 11700.

It is an arithmetic number, because the mean of its divisors is an integer number (8153520).

Almost surely, 2^61670447 is an apocalyptic number.

61670447 is a deficient number, since it is larger than the sum of its proper divisors (3557713).

61670447 is a wasteful number, since it uses less digits than its factorization.

61670447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15613.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 61670447 is about 7853.0533552243. The cubic root of 61670447 is about 395.0866594032.

The spelling of 61670447 in words is "sixty-one million, six hundred seventy thousand, four hundred forty-seven".