56667121 has 4 divisors (see below), whose sum is σ = 64762432. Its totient is φ = 48571812.

The previous prime is 56667097. The next prime is 56667133. The reversal of 56667121 is 12176665.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 56667121 - 2⁷ = 56666993 is a prime.

It is a super-2 number, since 2×56667121² = 6422325204857282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56667151) 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, 4047645 + ... + 4047658.

It is an arithmetic number, because the mean of its divisors is an integer number (16190608).

Almost surely, 2^56667121 is an apocalyptic number.

It is an amenable number.

56667121 is a deficient number, since it is larger than the sum of its proper divisors (8095311).

56667121 is an equidigital number, since it uses as much as digits as its factorization.

56667121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8095310.

The product of its digits is 15120, while the sum is 34.

The square root of 56667121 is about 7527.7567043575. The cubic root of 56667121 is about 384.0994773562.

The spelling of 56667121 in words is "fifty-six million, six hundred sixty-seven thousand, one hundred twenty-one".