66660048 has 120 divisors (see below), whose sum is σ = 229651968. Its totient is φ = 17577216.

The previous prime is 66659993. The next prime is 66660059. The reversal of 66660048 is 84006666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 66659994 and 66660021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10561 + ... + 15647.

Almost surely, 2^66660048 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 66660048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114825984).

66660048 is an abundant number, since it is smaller than the sum of its proper divisors (162991920).

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

66660048 is a wasteful number, since it uses less digits than its factorization.

66660048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5121 (or 5112 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 66660048 is about 8164.5604903142. The cubic root of 66660048 is about 405.4667139049.

The spelling of 66660048 in words is "sixty-six million, six hundred sixty thousand, forty-eight".