66190797 has 24 divisors (see below), whose sum is σ = 101365440. Its totient is φ = 42687000.

The previous prime is 66190793. The next prime is 66190807. The reversal of 66190797 is 79709166.

It is not a de Polignac number, because 66190797 - 2² = 66190793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66190793) 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 23 ways as a sum of consecutive naturals, for example, 24672 + ... + 27222.

It is an arithmetic number, because the mean of its divisors is an integer number (4223560).

Almost surely, 2^66190797 is an apocalyptic number.

It is an amenable number.

66190797 is a deficient number, since it is larger than the sum of its proper divisors (35174643).

66190797 is a wasteful number, since it uses less digits than its factorization.

66190797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622 (or 2585 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 66190797 is about 8135.7726738153. The cubic root of 66190797 is about 404.5130498687.

The spelling of 66190797 in words is "sixty-six million, one hundred ninety thousand, seven hundred ninety-seven".