66797351 has 4 divisors (see below), whose sum is σ = 67388592. Its totient is φ = 66206112.

The previous prime is 66797347. The next prime is 66797363. The reversal of 66797351 is 15379766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66797351 - 2² = 66797347 is a prime.

It is a super-2 number, since 2×66797351² = 8923772201234402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66797371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295451 + ... + 295676.

It is an arithmetic number, because the mean of its divisors is an integer number (16847148).

Almost surely, 2^66797351 is an apocalyptic number.

66797351 is a deficient number, since it is larger than the sum of its proper divisors (591241).

66797351 is a wasteful number, since it uses less digits than its factorization.

66797351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591240.

The product of its digits is 238140, while the sum is 44.

The square root of 66797351 is about 8172.9646395907. The cubic root of 66797351 is about 405.7449096071.

The spelling of 66797351 in words is "sixty-six million, seven hundred ninety-seven thousand, three hundred fifty-one".