66681348 has 48 divisors (see below), whose sum is σ = 159090624. Its totient is φ = 21732480.

The previous prime is 66681343. The next prime is 66681371. The reversal of 66681348 is 84318666.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66681343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158178 + ... + 158598.

It is an arithmetic number, because the mean of its divisors is an integer number (3314388).

Almost surely, 2^66681348 is an apocalyptic number.

It is an amenable number.

66681348 is an abundant number, since it is smaller than the sum of its proper divisors (92409276).

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

66681348 is a wasteful number, since it uses less digits than its factorization.

66681348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692 (or 690 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 66681348 is about 8165.8648041711. The cubic root of 66681348 is about 405.5098957985.

The spelling of 66681348 in words is "sixty-six million, six hundred eighty-one thousand, three hundred forty-eight".