66803420 has 24 divisors (see below), whose sum is σ = 141680448. Its totient is φ = 26456000.

The previous prime is 66803371. The next prime is 66803423. The reversal of 66803420 is 2430866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66803423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14516 + ... + 18555.

It is an arithmetic number, because the mean of its divisors is an integer number (5903352).

Almost surely, 2^66803420 is an apocalyptic number.

It is an amenable number.

66803420 is an abundant number, since it is smaller than the sum of its proper divisors (74877028).

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

66803420 is a wasteful number, since it uses less digits than its factorization.

66803420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33181 (or 33179 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 66803420 is about 8173.3359162584. The cubic root of 66803420 is about 405.7571974760.

The spelling of 66803420 in words is "sixty-six million, eight hundred three thousand, four hundred twenty".