55660649999 has 4 divisors (see below), whose sum is σ = 55664126064. Its totient is φ = 55657173936.

The previous prime is 55660649983. The next prime is 55660650013. The reversal of 55660649999 is 99994606655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55660649999 - 2⁴ = 55660649983 is a prime.

It is a super-2 number, since 2×55660649999² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55660649939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1713902 + ... + 1746075.

It is an arithmetic number, because the mean of its divisors is an integer number (13916031516).

Almost surely, 2^55660649999 is an apocalyptic number.

55660649999 is a deficient number, since it is larger than the sum of its proper divisors (3476065).

55660649999 is a wasteful number, since it uses less digits than its factorization.

55660649999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476064.

The product of its (nonzero) digits is 141717600, while the sum is 68.

The spelling of 55660649999 in words is "fifty-five billion, six hundred sixty million, six hundred forty-nine thousand, nine hundred ninety-nine".