66348140 has 48 divisors (see below), whose sum is σ = 143700480. Its totient is φ = 25717440.

The previous prime is 66348137. The next prime is 66348173. The reversal of 66348140 is 4184366.

It is a junction number, because it is equal to n+sod(n) for n = 66348097 and 66348106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153725 + ... + 154155.

It is an arithmetic number, because the mean of its divisors is an integer number (2993760).

Almost surely, 2^66348140 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 66348140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71850240).

66348140 is an abundant number, since it is smaller than the sum of its proper divisors (77352340).

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

66348140 is a wasteful number, since it uses less digits than its factorization.

66348140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 66348140 is about 8145.4367593150. The cubic root of 66348140 is about 404.8333206310.

The spelling of 66348140 in words is "sixty-six million, three hundred forty-eight thousand, one hundred forty".