66675648 has 56 divisors (see below), whose sum is σ = 189989968. Its totient is φ = 20514816.

The previous prime is 66675629. The next prime is 66675667. The reversal of 66675648 is 84657666.

It is an interprime number because it is at equal distance from previous prime (66675629) and next prime (66675667).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 66675597 and 66675606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10861 + ... + 15852.

It is an arithmetic number, because the mean of its divisors is an integer number (3392678).

Almost surely, 2^66675648 is an apocalyptic number.

It is an amenable number.

66675648 is an abundant number, since it is smaller than the sum of its proper divisors (123314320).

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

66675648 is a wasteful number, since it uses less digits than its factorization.

66675648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26741 (or 26731 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 66675648 is about 8165.5157828517. The cubic root of 66675648 is about 405.4983409818.

The spelling of 66675648 in words is "sixty-six million, six hundred seventy-five thousand, six hundred forty-eight".