66783450 has 48 divisors (see below), whose sum is σ = 166167936. Its totient is φ = 17750400.

The previous prime is 66783443. The next prime is 66783473. The reversal of 66783450 is 5438766.

It is a junction number, because it is equal to n+sod(n) for n = 66783399 and 66783408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64134 + ... + 65166.

It is an arithmetic number, because the mean of its divisors is an integer number (3461832).

Almost surely, 2^66783450 is an apocalyptic number.

66783450 is an abundant number, since it is smaller than the sum of its proper divisors (99384486).

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

66783450 is a wasteful number, since it uses less digits than its factorization.

66783450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479 (or 1474 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 66783450 is about 8172.1141695402. The cubic root of 66783450 is about 405.7167615283.

The spelling of 66783450 in words is "sixty-six million, seven hundred eighty-three thousand, four hundred fifty".