66336740 has 24 divisors (see below), whose sum is σ = 142273152. Its totient is φ = 25969760.

The previous prime is 66336727. The next prime is 66336769. The reversal of 66336740 is 4763366.

It is a self number, because there is not a number n which added to its sum of digits gives 66336740.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34346 + ... + 36225.

It is an arithmetic number, because the mean of its divisors is an integer number (5928048).

Almost surely, 2^66336740 is an apocalyptic number.

It is an amenable number.

66336740 is an abundant number, since it is smaller than the sum of its proper divisors (75936412).

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

66336740 is a wasteful number, since it uses less digits than its factorization.

66336740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70627 (or 70625 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 66336740 is about 8144.7369509395. The cubic root of 66336740 is about 404.8101330219.

It can be divided in two parts, 66336 and 740, that added together give a palindrome (67076).

The spelling of 66336740 in words is "sixty-six million, three hundred thirty-six thousand, seven hundred forty".