55766645 has 16 divisors (see below), whose sum is σ = 73733760. Its totient is φ = 40152000.

The previous prime is 55766639. The next prime is 55766693. The reversal of 55766645 is 54666755.

It is not a de Polignac number, because 55766645 - 2⁴ = 55766629 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55766596 and 55766605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536 + ... + 10574.

It is an arithmetic number, because the mean of its divisors is an integer number (4608360).

Almost surely, 2^55766645 is an apocalyptic number.

55766645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55766645 is a deficient number, since it is larger than the sum of its proper divisors (17967115).

55766645 is a wasteful number, since it uses less digits than its factorization.

55766645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156.

The product of its digits is 756000, while the sum is 44.

The square root of 55766645 is about 7467.7068099919. The cubic root of 55766645 is about 382.0540775758.

It can be divided in two parts, 5576 and 6645, that added together give a palindrome (12221).

The spelling of 55766645 in words is "fifty-five million, seven hundred sixty-six thousand, six hundred forty-five".