66748797 has 12 divisors (see below), whose sum is σ = 99525504. Its totient is φ = 43063560.

The previous prime is 66748793. The next prime is 66748831. The reversal of 66748797 is 79784766.

It is not a de Polignac number, because 66748797 - 2² = 66748793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66748793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119343 + ... + 119900.

It is an arithmetic number, because the mean of its divisors is an integer number (8293792).

Almost surely, 2^66748797 is an apocalyptic number.

It is an amenable number.

66748797 is a deficient number, since it is larger than the sum of its proper divisors (32776707).

66748797 is a wasteful number, since it uses less digits than its factorization.

66748797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239280 (or 239277 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The square root of 66748797 is about 8169.9936964480. The cubic root of 66748797 is about 405.6465757994.

The spelling of 66748797 in words is "sixty-six million, seven hundred forty-eight thousand, seven hundred ninety-seven".