66393297 has 8 divisors (see below), whose sum is σ = 98360480. Its totient is φ = 44262180.

The previous prime is 66393287. The next prime is 66393311. The reversal of 66393297 is 79239366.

66393297 is a `hidden beast` number, since 6 + 639 + 3 + 2 + 9 + 7 = 666.

It is not a de Polignac number, because 66393297 - 2⁶ = 66393233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66393287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1229479 + ... + 1229532.

It is an arithmetic number, because the mean of its divisors is an integer number (12295060).

Almost surely, 2^66393297 is an apocalyptic number.

It is an amenable number.

66393297 is a deficient number, since it is larger than the sum of its proper divisors (31967183).

66393297 is a wasteful number, since it uses less digits than its factorization.

66393297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459020 (or 2459014 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 66393297 is about 8148.2082079436. The cubic root of 66393297 is about 404.9251439156.

The spelling of 66393297 in words is "sixty-six million, three hundred ninety-three thousand, two hundred ninety-seven".