61660423 has 4 divisors (see below), whose sum is σ = 67265928. Its totient is φ = 56054920.

The previous prime is 61660387. The next prime is 61660441. The reversal of 61660423 is 32406616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61660423 - 2²⁵ = 28105991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61660391 and 61660400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61660523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2802736 + ... + 2802757.

It is an arithmetic number, because the mean of its divisors is an integer number (16816482).

Almost surely, 2^61660423 is an apocalyptic number.

61660423 is a deficient number, since it is larger than the sum of its proper divisors (5605505).

61660423 is a wasteful number, since it uses less digits than its factorization.

61660423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5605504.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 61660423 is about 7852.4151061950. The cubic root of 61660423 is about 395.0652522655.

The spelling of 61660423 in words is "sixty-one million, six hundred sixty thousand, four hundred twenty-three".