66047480 has 32 divisors (see below), whose sum is σ = 150649200. Its totient is φ = 26055936.

The previous prime is 66047473. The next prime is 66047489. The reversal of 66047480 is 8474066.

It is a super-2 number, since 2×66047480² = 8724539228700800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66047480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66047489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8390 + ... + 14229.

Almost surely, 2^66047480 is an apocalyptic number.

It is an amenable number.

66047480 is an abundant number, since it is smaller than the sum of its proper divisors (84601720).

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

66047480 is a wasteful number, since it uses less digits than its factorization.

66047480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22703 (or 22699 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 66047480 is about 8126.9600712690. The cubic root of 66047480 is about 404.2208869524.

The spelling of 66047480 in words is "sixty-six million, forty-seven thousand, four hundred eighty".