55471666 has 4 divisors (see below), whose sum is σ = 83207502. Its totient is φ = 27735832.

The previous prime is 55471649. The next prime is 55471687. The reversal of 55471666 is 66617455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47320641 + 8151025 = 6879^2 + 2855^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13867915 + ... + 13867918.

Almost surely, 2^55471666 is an apocalyptic number.

55471666 is a deficient number, since it is larger than the sum of its proper divisors (27735836).

55471666 is a wasteful number, since it uses less digits than its factorization.

55471666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27735835.

The product of its digits is 151200, while the sum is 40.

The square root of 55471666 is about 7447.9303165376. The cubic root of 55471666 is about 381.3792582946.

The spelling of 55471666 in words is "fifty-five million, four hundred seventy-one thousand, six hundred sixty-six".