66380948 has 6 divisors (see below), whose sum is σ = 116166666. Its totient is φ = 33190472.

The previous prime is 66380947. The next prime is 66380957. The reversal of 66380948 is 84908366.

It can be written as a sum of positive squares in only one way, i.e., 52823824 + 13557124 = 7268^2 + 3682^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66380899 and 66380908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66380947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8297615 + ... + 8297622.

It is an arithmetic number, because the mean of its divisors is an integer number (19361111).

Almost surely, 2^66380948 is an apocalyptic number.

It is an amenable number.

66380948 is a deficient number, since it is larger than the sum of its proper divisors (49785718).

66380948 is a wasteful number, since it uses less digits than its factorization.

66380948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16595241 (or 16595239 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 66380948 is about 8147.4503987444. The cubic root of 66380948 is about 404.9000373115.

The spelling of 66380948 in words is "sixty-six million, three hundred eighty thousand, nine hundred forty-eight".