66591379 has 8 divisors (see below), whose sum is σ = 70598528. Its totient is φ = 62700480.

The previous prime is 66591377. The next prime is 66591439. The reversal of 66591379 is 97319566.

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 66591379 - 2¹ = 66591377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66591377) 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, 27882 + ... + 30175.

It is an arithmetic number, because the mean of its divisors is an integer number (8824816).

Almost surely, 2^66591379 is an apocalyptic number.

66591379 is a deficient number, since it is larger than the sum of its proper divisors (4007149).

66591379 is a wasteful number, since it uses less digits than its factorization.

66591379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58125.

The product of its digits is 306180, while the sum is 46.

The square root of 66591379 is about 8160.3540977092. The cubic root of 66591379 is about 405.3274372778.

The spelling of 66591379 in words is "sixty-six million, five hundred ninety-one thousand, three hundred seventy-nine".