61343663 has 4 divisors (see below), whose sum is σ = 61951128. Its totient is φ = 60736200.

The previous prime is 61343641. The next prime is 61343677. The reversal of 61343663 is 36634316.

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 61343663 - 2²⁰ = 60295087 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 (61343603) 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, 303581 + ... + 303782.

It is an arithmetic number, because the mean of its divisors is an integer number (15487782).

Almost surely, 2^61343663 is an apocalyptic number.

61343663 is a deficient number, since it is larger than the sum of its proper divisors (607465).

61343663 is a wasteful number, since it uses less digits than its factorization.

61343663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607464.

The product of its digits is 23328, while the sum is 32.

The square root of 61343663 is about 7832.2195449311. The cubic root of 61343663 is about 394.3875848801.

Adding to 61343663 its reverse (36634316), we get a palindrome (97977979).

The spelling of 61343663 in words is "sixty-one million, three hundred forty-three thousand, six hundred sixty-three".