61566353 has 4 divisors (see below), whose sum is σ = 61979700. Its totient is φ = 61153008.

The previous prime is 61566347. The next prime is 61566383. The reversal of 61566353 is 35366516.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25482304 + 36084049 = 5048^2 + 6007^2 .

It is a cyclic number.

It is not a de Polignac number, because 61566353 - 2⁸ = 61566097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61566343) 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, 206450 + ... + 206747.

It is an arithmetic number, because the mean of its divisors is an integer number (15494925).

Almost surely, 2^61566353 is an apocalyptic number.

It is an amenable number.

61566353 is a deficient number, since it is larger than the sum of its proper divisors (413347).

61566353 is a wasteful number, since it uses less digits than its factorization.

61566353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413346.

The product of its digits is 48600, while the sum is 35.

The square root of 61566353 is about 7846.4229429722. The cubic root of 61566353 is about 394.8642443271.

The spelling of 61566353 in words is "sixty-one million, five hundred sixty-six thousand, three hundred fifty-three".