42666550 has 24 divisors (see below), whose sum is σ = 81508176. Its totient is φ = 16604640.

The previous prime is 42666523. The next prime is 42666577. The reversal of 42666550 is 5566624.

It is an interprime number because it is at equal distance from previous prime (42666523) and next prime (42666577).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9682 + ... + 13381.

It is an arithmetic number, because the mean of its divisors is an integer number (3396174).

Almost surely, 2^42666550 is an apocalyptic number.

42666550 is a deficient number, since it is larger than the sum of its proper divisors (38841626).

42666550 is a wasteful number, since it uses less digits than its factorization.

42666550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23112 (or 23107 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 42666550 is about 6531.9637169843. The cubic root of 42666550 is about 349.4318674014.

It can be divided in two parts, 4266 and 6550, that added together give a square (10816 = 104²).

The spelling of 42666550 in words is "forty-two million, six hundred sixty-six thousand, five hundred fifty".