66948245 has 16 divisors (see below), whose sum is σ = 98878080. Its totient is φ = 42375744.

The previous prime is 66948241. The next prime is 66948253. The reversal of 66948245 is 54284966.

It is a cyclic number.

It is not a de Polignac number, because 66948245 - 2² = 66948241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66948196 and 66948205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66948241) 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, 73115 + ... + 74024.

It is an arithmetic number, because the mean of its divisors is an integer number (6179880).

Almost surely, 2^66948245 is an apocalyptic number.

66948245 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66948245 is a deficient number, since it is larger than the sum of its proper divisors (31929835).

66948245 is a wasteful number, since it uses less digits than its factorization.

66948245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147164.

The product of its digits is 414720, while the sum is 44.

The square root of 66948245 is about 8182.1907213166. The cubic root of 66948245 is about 406.0502032931.

The spelling of 66948245 in words is "sixty-six million, nine hundred forty-eight thousand, two hundred forty-five".