66380393 has 8 divisors (see below), whose sum is σ = 72552960. Its totient is φ = 60459840.

The previous prime is 66380387. The next prime is 66380399. The reversal of 66380393 is 39308366.

It is an interprime number because it is at equal distance from previous prime (66380387) and next prime (66380399).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66380393 - 2⁸ = 66380137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66380399) 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, 62453 + ... + 63506.

It is an arithmetic number, because the mean of its divisors is an integer number (9069120).

Almost surely, 2^66380393 is an apocalyptic number.

It is an amenable number.

66380393 is a deficient number, since it is larger than the sum of its proper divisors (6172567).

66380393 is a wasteful number, since it uses less digits than its factorization.

66380393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126007.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 66380393 is about 8147.4163389384. The cubic root of 66380393 is about 404.8989088745.

The spelling of 66380393 in words is "sixty-six million, three hundred eighty thousand, three hundred ninety-three".