55866837 has 24 divisors (see below), whose sum is σ = 81533088. Its totient is φ = 34008000.

The previous prime is 55866817. The next prime is 55866851. The reversal of 55866837 is 73866855.

It is not a de Polignac number, because 55866837 - 2⁶ = 55866773 is a prime.

It is a super-2 number, since 2×55866837² = 6242206952769138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55866817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50662 + ... + 51752.

It is an arithmetic number, because the mean of its divisors is an integer number (3397212).

Almost surely, 2^55866837 is an apocalyptic number.

It is an amenable number.

55866837 is a deficient number, since it is larger than the sum of its proper divisors (25666251).

55866837 is a wasteful number, since it uses less digits than its factorization.

55866837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 1208 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 48.

The square root of 55866837 is about 7474.4121507982. The cubic root of 55866837 is about 382.2827438974.

The spelling of 55866837 in words is "fifty-five million, eight hundred sixty-six thousand, eight hundred thirty-seven".