56665426 has 8 divisors (see below), whose sum is σ = 87295500. Its totient is φ = 27566928.

The previous prime is 56665423. The next prime is 56665487. The reversal of 56665426 is 62456665.

It can be written as a sum of positive squares in 2 ways, for example, as 54774801 + 1890625 = 7401^2 + 1375^2 .

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

It is a super-2 number, since 2×56665426² = 6421941007522952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56665423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382801 + ... + 382948.

Almost surely, 2^56665426 is an apocalyptic number.

56665426 is a deficient number, since it is larger than the sum of its proper divisors (30630074).

56665426 is a wasteful number, since it uses less digits than its factorization.

56665426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765788.

The product of its digits is 259200, while the sum is 40.

The square root of 56665426 is about 7527.6441201747. The cubic root of 56665426 is about 384.0956476510.

The spelling of 56665426 in words is "fifty-six million, six hundred sixty-five thousand, four hundred twenty-six".