66455797 has 4 divisors (see below), whose sum is σ = 66547936. Its totient is φ = 66363660.

The previous prime is 66455789. The next prime is 66455801. The reversal of 66455797 is 79755466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66455797 - 2³ = 66455789 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 66455797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66455777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44979 + ... + 46432.

It is an arithmetic number, because the mean of its divisors is an integer number (16636984).

Almost surely, 2^66455797 is an apocalyptic number.

It is an amenable number.

66455797 is a deficient number, since it is larger than the sum of its proper divisors (92139).

66455797 is an equidigital number, since it uses as much as digits as its factorization.

66455797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92138.

The product of its digits is 1587600, while the sum is 49.

The square root of 66455797 is about 8152.0425047960. The cubic root of 66455797 is about 405.0521641898.

The spelling of 66455797 in words is "sixty-six million, four hundred fifty-five thousand, seven hundred ninety-seven".