66202040 has 16 divisors (see below), whose sum is σ = 148954680. Its totient is φ = 26480800.

The previous prime is 66202013. The next prime is 66202049. The reversal of 66202040 is 4020266.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66202049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827486 + ... + 827565.

Almost surely, 2^66202040 is an apocalyptic number.

It is an amenable number.

66202040 is an abundant number, since it is smaller than the sum of its proper divisors (82752640).

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

66202040 is a wasteful number, since it uses less digits than its factorization.

66202040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655062 (or 1655058 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 66202040 is about 8136.4636052772. The cubic root of 66202040 is about 404.5359517571.

The spelling of 66202040 in words is "sixty-six million, two hundred two thousand, forty".