42516660 has 96 divisors (see below), whose sum is σ = 127999872. Its totient is φ = 10506240.

The previous prime is 42516641. The next prime is 42516671. The reversal of 42516660 is 6661524.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74175 + ... + 74745.

It is an arithmetic number, because the mean of its divisors is an integer number (1333332).

Almost surely, 2^42516660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42516660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63999936).

42516660 is an abundant number, since it is smaller than the sum of its proper divisors (85483212).

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

42516660 is a wasteful number, since it uses less digits than its factorization.

42516660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 42516660 is about 6520.4800436778. The cubic root of 42516660 is about 349.0221959978.

The spelling of 42516660 in words is "forty-two million, five hundred sixteen thousand, six hundred sixty".