66790548 has 144 divisors (see below), whose sum is σ = 201096000. Its totient is φ = 19103040.

The previous prime is 66790541. The next prime is 66790561. The reversal of 66790548 is 84509766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66790541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248158 + ... + 248426.

It is an arithmetic number, because the mean of its divisors is an integer number (1396500).

Almost surely, 2^66790548 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 66790548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100548000).

66790548 is an abundant number, since it is smaller than the sum of its proper divisors (134305452).

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

66790548 is a wasteful number, since it uses less digits than its factorization.

66790548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 66790548 is about 8172.5484397463. The cubic root of 66790548 is about 405.7311347279.

The spelling of 66790548 in words is "sixty-six million, seven hundred ninety thousand, five hundred forty-eight".