42666648 has 32 divisors (see below), whose sum is σ = 107956800. Its totient is φ = 14050208.

The previous prime is 42666641. The next prime is 42666667. The reversal of 42666648 is 84666624.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42666641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8718 + ... + 12701.

It is an arithmetic number, because the mean of its divisors is an integer number (3373650).

Almost surely, 2^42666648 is an apocalyptic number.

It is an amenable number.

42666648 is an abundant number, since it is smaller than the sum of its proper divisors (65290152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42666648 is a wasteful number, since it uses less digits than its factorization.

42666648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21511 (or 21507 counting only the distinct ones).

The product of its digits is 331776, while the sum is 42.

The square root of 42666648 is about 6531.9712185526. The cubic root of 42666648 is about 349.4321349357.

The spelling of 42666648 in words is "forty-two million, six hundred sixty-six thousand, six hundred forty-eight".