56667891 has 8 divisors (see below), whose sum is σ = 86351104. Its totient is φ = 32381640.

The previous prime is 56667889. The next prime is 56667911. The reversal of 56667891 is 19876665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56667891 - 2¹ = 56667889 is a prime.

It is a super-2 number, since 2×56667891² = 6422499740775762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56667891.

It is not an unprimeable number, because it can be changed into a prime (56667811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1349215 + ... + 1349256.

It is an arithmetic number, because the mean of its divisors is an integer number (10793888).

Almost surely, 2^56667891 is an apocalyptic number.

56667891 is a deficient number, since it is larger than the sum of its proper divisors (29683213).

56667891 is a wasteful number, since it uses less digits than its factorization.

56667891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698481.

The product of its digits is 544320, while the sum is 48.

The square root of 56667891 is about 7527.8078482384. The cubic root of 56667891 is about 384.1012170791.

The spelling of 56667891 in words is "fifty-six million, six hundred sixty-seven thousand, eight hundred ninety-one".