55660649 has 8 divisors (see below), whose sum is σ = 60775680. Its totient is φ = 50554800.

The previous prime is 55660607. The next prime is 55660681. The reversal of 55660649 is 94606655.

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 55660649 - 2¹² = 55656553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55660349) 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 7 ways as a sum of consecutive naturals, for example, 19112 + ... + 21830.

It is an arithmetic number, because the mean of its divisors is an integer number (7596960).

Almost surely, 2^55660649 is an apocalyptic number.

It is an amenable number.

55660649 is a deficient number, since it is larger than the sum of its proper divisors (5115031).

55660649 is a wasteful number, since it uses less digits than its factorization.

55660649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 55660649 is about 7460.6064766881. The cubic root of 55660649 is about 381.8118665536.

It can be divided in two parts, 556606 and 49, that added together give a palindrome (556655).

The spelling of 55660649 in words is "fifty-five million, six hundred sixty thousand, six hundred forty-nine".