55001666 has 8 divisors (see below), whose sum is σ = 82534464. Its totient is φ = 27490180.

The previous prime is 55001659. The next prime is 55001669. The reversal of 55001666 is 66610055.

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

It is not an unprimeable number, because it can be changed into a prime (55001669) 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, 5651 + ... + 11913.

It is an arithmetic number, because the mean of its divisors is an integer number (10316808).

Almost surely, 2^55001666 is an apocalyptic number.

55001666 is a deficient number, since it is larger than the sum of its proper divisors (27532798).

55001666 is a wasteful number, since it uses less digits than its factorization.

55001666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10656.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 55001666 is about 7416.3108079422. The cubic root of 55001666 is about 380.2990858669.

The spelling of 55001666 in words is "fifty-five million, one thousand, six hundred sixty-six".