66880850 has 12 divisors (see below), whose sum is σ = 124398474. Its totient is φ = 26752320.

The previous prime is 66880843. The next prime is 66880889. The reversal of 66880850 is 5808866.

It can be written as a sum of positive squares in 3 ways, for example, as 37319881 + 29560969 = 6109^2 + 5437^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66880798 and 66880807.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 668759 + ... + 668858.

Almost surely, 2^66880850 is an apocalyptic number.

66880850 is a deficient number, since it is larger than the sum of its proper divisors (57517624).

66880850 is a wasteful number, since it uses less digits than its factorization.

66880850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337629 (or 1337624 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 66880850 is about 8178.0712885130. The cubic root of 66880850 is about 405.9139042690.

It can be divided in two parts, 668 and 80850, that added together give a palindrome (81518).

The spelling of 66880850 in words is "sixty-six million, eight hundred eighty thousand, eight hundred fifty".