61660353 has 4 divisors (see below), whose sum is σ = 82213808. Its totient is φ = 41106900.

The previous prime is 61660331. The next prime is 61660363. The reversal of 61660353 is 35306616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61660353 - 2⁶ = 61660289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61660353.

It is not an unprimeable number, because it can be changed into a prime (61660363) 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, 10276723 + ... + 10276728.

It is an arithmetic number, because the mean of its divisors is an integer number (20553452).

Almost surely, 2^61660353 is an apocalyptic number.

It is an amenable number.

61660353 is a deficient number, since it is larger than the sum of its proper divisors (20553455).

61660353 is a wasteful number, since it uses less digits than its factorization.

61660353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20553454.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 61660353 is about 7852.4106489663. The cubic root of 61660353 is about 395.0651027661.

Adding to 61660353 its reverse (35306616), we get a palindrome (96966969).

The spelling of 61660353 in words is "sixty-one million, six hundred sixty thousand, three hundred fifty-three".