55201666 has 8 divisors (see below), whose sum is σ = 89171964. Its totient is φ = 25477680.

The previous prime is 55201613. The next prime is 55201681. The reversal of 55201666 is 66610255.

It can be written as a sum of positive squares in 2 ways, for example, as 54243225 + 958441 = 7365^2 + 979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1061545 + ... + 1061596.

Almost surely, 2^55201666 is an apocalyptic number.

55201666 is a deficient number, since it is larger than the sum of its proper divisors (33970298).

55201666 is a wasteful number, since it uses less digits than its factorization.

55201666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123156.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 55201666 is about 7429.7823655878. The cubic root of 55201666 is about 380.7594829031.

The spelling of 55201666 in words is "fifty-five million, two hundred one thousand, six hundred sixty-six".