66703400 has 24 divisors (see below), whose sum is σ = 155085870. Its totient is φ = 26681280.

The previous prime is 66703397. The next prime is 66703409. The reversal of 66703400 is 430766.

66703400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 28238596 + 38464804 = 5314^2 + 6202^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66703400.

It is not an unprimeable number, because it can be changed into a prime (66703409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166559 + ... + 166958.

Almost surely, 2^66703400 is an apocalyptic number.

It is an amenable number.

66703400 is an abundant number, since it is smaller than the sum of its proper divisors (88382470).

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

66703400 is a wasteful number, since it uses less digits than its factorization.

66703400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333533 (or 333524 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 66703400 is about 8167.2149475816. The cubic root of 66703400 is about 405.5545925486.

The spelling of 66703400 in words is "sixty-six million, seven hundred three thousand, four hundred".