64662427 has 4 divisors (see below), whose sum is σ = 64969096. Its totient is φ = 64355760.

The previous prime is 64662419. The next prime is 64662439. The reversal of 64662427 is 72426646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72426646 = 2 ⋅36213323.

It is a cyclic number.

It is not a de Polignac number, because 64662427 - 2³ = 64662419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64662487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153018 + ... + 153439.

It is an arithmetic number, because the mean of its divisors is an integer number (16242274).

Almost surely, 2^64662427 is an apocalyptic number.

64662427 is a deficient number, since it is larger than the sum of its proper divisors (306669).

64662427 is a wasteful number, since it uses less digits than its factorization.

64662427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306668.

The product of its digits is 96768, while the sum is 37.

The square root of 64662427 is about 8041.2951071329. The cubic root of 64662427 is about 401.3753220535.

The spelling of 64662427 in words is "sixty-four million, six hundred sixty-two thousand, four hundred twenty-seven".