66351248 has 20 divisors (see below), whose sum is σ = 128682240. Its totient is φ = 33142944.

The previous prime is 66351247. The next prime is 66351281. The reversal of 66351248 is 84215366.

It is a super-2 number, since 2×66351248² = 8804976222315008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66351247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28961 + ... + 31167.

It is an arithmetic number, because the mean of its divisors is an integer number (6434112).

Almost surely, 2^66351248 is an apocalyptic number.

It is an amenable number.

66351248 is a deficient number, since it is larger than the sum of its proper divisors (62330992).

66351248 is a wasteful number, since it uses less digits than its factorization.

66351248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094 (or 4088 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 66351248 is about 8145.6275387474. The cubic root of 66351248 is about 404.8396418447.

The spelling of 66351248 in words is "sixty-six million, three hundred fifty-one thousand, two hundred forty-eight".