55066521 has 8 divisors (see below), whose sum is σ = 73738080. Its totient is φ = 36552992.

The previous prime is 55066507. The next prime is 55066537. The reversal of 55066521 is 12566055.

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 55066521 - 2⁵ = 55066489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55066021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38691 + ... + 40088.

It is an arithmetic number, because the mean of its divisors is an integer number (9217260).

Almost surely, 2^55066521 is an apocalyptic number.

It is an amenable number.

55066521 is a deficient number, since it is larger than the sum of its proper divisors (18671559).

55066521 is a wasteful number, since it uses less digits than its factorization.

55066521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79015.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 55066521 is about 7420.6819767458. The cubic root of 55066521 is about 380.4485032154.

The spelling of 55066521 in words is "fifty-five million, sixty-six thousand, five hundred twenty-one".