66274807 has 8 divisors (see below), whose sum is σ = 70262912. Its totient is φ = 62402400.

The previous prime is 66274801. The next prime is 66274867. The reversal of 66274807 is 70847266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66274807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66274807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66274801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27744 + ... + 30037.

It is an arithmetic number, because the mean of its divisors is an integer number (8782864).

Almost surely, 2^66274807 is an apocalyptic number.

66274807 is a deficient number, since it is larger than the sum of its proper divisors (3988105).

66274807 is a wasteful number, since it uses less digits than its factorization.

66274807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57849.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 66274807 is about 8140.9340373203. The cubic root of 66274807 is about 404.6841148090.

It can be divided in two parts, 66274 and 807, that added together give a square (67081 = 259²).

The spelling of 66274807 in words is "sixty-six million, two hundred seventy-four thousand, eight hundred seven".