55666745 has 4 divisors (see below), whose sum is σ = 66800100. Its totient is φ = 44533392.

The previous prime is 55666727. The next prime is 55666757. The reversal of 55666745 is 54766655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54766655 = 5 ⋅10953331.

It can be written as a sum of positive squares in 2 ways, for example, as 11417641 + 44249104 = 3379^2 + 6652^2 .

It is a cyclic number.

It is not a de Polignac number, because 55666745 - 2⁸ = 55666489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55666696 and 55666705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5566670 + ... + 5566679.

It is an arithmetic number, because the mean of its divisors is an integer number (16700025).

Almost surely, 2^55666745 is an apocalyptic number.

It is an amenable number.

55666745 is a deficient number, since it is larger than the sum of its proper divisors (11133355).

55666745 is a wasteful number, since it uses less digits than its factorization.

55666745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11133354.

The product of its digits is 756000, while the sum is 44.

The square root of 55666745 is about 7461.0150113775. The cubic root of 55666745 is about 381.8258048279.

The spelling of 55666745 in words is "fifty-five million, six hundred sixty-six thousand, seven hundred forty-five".