66756349 has 8 divisors (see below), whose sum is σ = 72884448. Its totient is φ = 60638160.

The previous prime is 66756311. The next prime is 66756359. The reversal of 66756349 is 94365766.

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

It is a de Polignac number, because none of the positive numbers 2^k-66756349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66756299 and 66756308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66756359) 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, 23599 + ... + 26275.

It is an arithmetic number, because the mean of its divisors is an integer number (9110556).

Almost surely, 2^66756349 is an apocalyptic number.

It is an amenable number.

66756349 is a deficient number, since it is larger than the sum of its proper divisors (6128099).

66756349 is a wasteful number, since it uses less digits than its factorization.

66756349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4955.

The product of its digits is 816480, while the sum is 46.

The square root of 66756349 is about 8170.4558624351. The cubic root of 66756349 is about 405.6618735902.

The spelling of 66756349 in words is "sixty-six million, seven hundred fifty-six thousand, three hundred forty-nine".