55407665 has 8 divisors (see below), whose sum is σ = 66548520. Its totient is φ = 44286592.

The previous prime is 55407659. The next prime is 55407731. The reversal of 55407665 is 56670455.

55407665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17572864 + 37834801 = 4192^2 + 6151^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55407665 - 2⁸ = 55407409 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2147 + ... + 10743.

It is an arithmetic number, because the mean of its divisors is an integer number (8318565).

Almost surely, 2^55407665 is an apocalyptic number.

It is an amenable number.

55407665 is a deficient number, since it is larger than the sum of its proper divisors (11140855).

55407665 is a wasteful number, since it uses less digits than its factorization.

55407665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9891.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 55407665 is about 7443.6325137664. The cubic root of 55407665 is about 381.2325284478.

The spelling of 55407665 in words is "fifty-five million, four hundred seven thousand, six hundred sixty-five".