56567661 has 16 divisors (see below), whose sum is σ = 79844160. Its totient is φ = 35562240.

The previous prime is 56567639. The next prime is 56567663. The reversal of 56567661 is 16676565.

It is not a de Polignac number, because 56567661 - 2⁶ = 56567597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56567663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3820 + ... + 11301.

It is an arithmetic number, because the mean of its divisors is an integer number (4990260).

Almost surely, 2^56567661 is an apocalyptic number.

It is an amenable number.

56567661 is a deficient number, since it is larger than the sum of its proper divisors (23276499).

56567661 is a wasteful number, since it uses less digits than its factorization.

56567661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15196.

The product of its digits is 226800, while the sum is 42.

The square root of 56567661 is about 7521.1475853090. The cubic root of 56567661 is about 383.8746267685.

The spelling of 56567661 in words is "fifty-six million, five hundred sixty-seven thousand, six hundred sixty-one".