55666733 has 4 divisors (see below), whose sum is σ = 55698720. Its totient is φ = 55634748.

The previous prime is 55666727. The next prime is 55666757. The reversal of 55666733 is 33766655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55666733 - 2⁴ = 55666717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55666763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13223 + ... + 16916.

It is an arithmetic number, because the mean of its divisors is an integer number (13924680).

Almost surely, 2^55666733 is an apocalyptic number.

It is an amenable number.

55666733 is a deficient number, since it is larger than the sum of its proper divisors (31987).

55666733 is a wasteful number, since it uses less digits than its factorization.

55666733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31986.

The product of its digits is 340200, while the sum is 41.

The square root of 55666733 is about 7461.0142071973. The cubic root of 55666733 is about 381.8257773913.

The spelling of 55666733 in words is "fifty-five million, six hundred sixty-six thousand, seven hundred thirty-three".