55445668 has 6 divisors (see below), whose sum is σ = 97029926. Its totient is φ = 27722832.

The previous prime is 55445659. The next prime is 55445693. The reversal of 55445668 is 86654455.

It can be written as a sum of positive squares in only one way, i.e., 36505764 + 18939904 = 6042^2 + 4352^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6930705 + ... + 6930712.

Almost surely, 2^55445668 is an apocalyptic number.

It is an amenable number.

55445668 is a deficient number, since it is larger than the sum of its proper divisors (41584258).

55445668 is a wasteful number, since it uses less digits than its factorization.

55445668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13861421 (or 13861419 counting only the distinct ones).

The product of its digits is 576000, while the sum is 43.

The square root of 55445668 is about 7446.1847949134. The cubic root of 55445668 is about 381.3196684292.

The spelling of 55445668 in words is "fifty-five million, four hundred forty-five thousand, six hundred sixty-eight".