66880340 has 24 divisors (see below), whose sum is σ = 140606592. Its totient is φ = 26722080.

The previous prime is 66880313. The next prime is 66880357. The reversal of 66880340 is 4308866.

It is a self number, because there is not a number n which added to its sum of digits gives 66880340.

It is a congruent number.

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, 27785 + ... + 30095.

It is an arithmetic number, because the mean of its divisors is an integer number (5858608).

Almost surely, 2^66880340 is an apocalyptic number.

It is an amenable number.

66880340 is an abundant number, since it is smaller than the sum of its proper divisors (73726252).

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

66880340 is a wasteful number, since it uses less digits than its factorization.

66880340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767 (or 3765 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 66880340 is about 8178.0401075074. The cubic root of 66880340 is about 405.9128725007.

The spelling of 66880340 in words is "sixty-six million, eight hundred eighty thousand, three hundred forty".