66312427 has 16 divisors (see below), whose sum is σ = 73749312. Its totient is φ = 59304960.

The previous prime is 66312419. The next prime is 66312431. The reversal of 66312427 is 72421366.

It is a cyclic number.

It is not a de Polignac number, because 66312427 - 2³ = 66312419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66312437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70303 + ... + 71239.

It is an arithmetic number, because the mean of its divisors is an integer number (4609332).

Almost surely, 2^66312427 is an apocalyptic number.

66312427 is a deficient number, since it is larger than the sum of its proper divisors (7436885).

66312427 is a wasteful number, since it uses less digits than its factorization.

66312427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158.

The product of its digits is 12096, while the sum is 31.

The square root of 66312427 is about 8143.2442552093. The cubic root of 66312427 is about 404.7606714846.

The spelling of 66312427 in words is "sixty-six million, three hundred twelve thousand, four hundred twenty-seven".