66047488 has 40 divisors (see below), whose sum is σ = 142131528. Its totient is φ = 30480384.

The previous prime is 66047473. The next prime is 66047489. The reversal of 66047488 is 88474066.

It is a super-2 number, since 2×66047488² = 8724541342220288, which contains 22 as substring.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1695 + ... + 11617.

Almost surely, 2^66047488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66047488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71065764).

66047488 is an abundant number, since it is smaller than the sum of its proper divisors (76084040).

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

66047488 is an equidigital number, since it uses as much as digits as its factorization.

66047488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9954 (or 9938 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 66047488 is about 8126.9605634579. The cubic root of 66047488 is about 404.2209032728.

The spelling of 66047488 in words is "sixty-six million, forty-seven thousand, four hundred eighty-eight".