66707442 has 64 divisors (see below), whose sum is σ = 158208000. Its totient is φ = 20773584.

The previous prime is 66707441. The next prime is 66707447. The reversal of 66707442 is 24470766.

It is a junction number, because it is equal to n+sod(n) for n = 66707397 and 66707406.

It is not an unprimeable number, because it can be changed into a prime (66707441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80643 + ... + 81465.

It is an arithmetic number, because the mean of its divisors is an integer number (2472000).

Almost surely, 2^66707442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66707442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79104000).

66707442 is an abundant number, since it is smaller than the sum of its proper divisors (91500558).

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

66707442 is a wasteful number, since it uses less digits than its factorization.

66707442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 66707442 is about 8167.4623966077. The cubic root of 66707442 is about 405.5627841278.

The spelling of 66707442 in words is "sixty-six million, seven hundred seven thousand, four hundred forty-two".