66441740 has 24 divisors (see below), whose sum is σ = 140767200. Its totient is φ = 26340608.

The previous prime is 66441731. The next prime is 66441743. The reversal of 66441740 is 4714466.

It is a junction number, because it is equal to n+sod(n) for n = 66441697 and 66441706.

It is not an unprimeable number, because it can be changed into a prime (66441743) 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, 12440 + ... + 16959.

It is an arithmetic number, because the mean of its divisors is an integer number (5865300).

Almost surely, 2^66441740 is an apocalyptic number.

It is an amenable number.

66441740 is an abundant number, since it is smaller than the sum of its proper divisors (74325460).

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

66441740 is a wasteful number, since it uses less digits than its factorization.

66441740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29521 (or 29519 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 66441740 is about 8151.1802826339. The cubic root of 66441740 is about 405.0236027498.

The spelling of 66441740 in words is "sixty-six million, four hundred forty-one thousand, seven hundred forty".