66345097 has 16 divisors (see below), whose sum is σ = 82131840. Its totient is φ = 52186752.

The previous prime is 66345091. The next prime is 66345109. The reversal of 66345097 is 79054366.

66345097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66345097 - 2¹⁵ = 66312329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66345091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14253 + ... + 18325.

It is an arithmetic number, because the mean of its divisors is an integer number (5133240).

Almost surely, 2^66345097 is an apocalyptic number.

66345097 is the 4073-rd decagonal number.

It is an amenable number.

66345097 is a deficient number, since it is larger than the sum of its proper divisors (15786743).

66345097 is a wasteful number, since it uses less digits than its factorization.

66345097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 66345097 is about 8145.2499654707. The cubic root of 66345097 is about 404.8271314264.

The spelling of 66345097 in words is "sixty-six million, three hundred forty-five thousand, ninety-seven".