64409667 has 36 divisors (see below), whose sum is σ = 103662936. Its totient is φ = 35468160.

The previous prime is 64409659. The next prime is 64409671. The reversal of 64409667 is 76690446.

64409667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64409667 - 2³ = 64409659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64409627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 123367 + ... + 123887.

It is an arithmetic number, because the mean of its divisors is an integer number (2879526).

Almost surely, 2^64409667 is an apocalyptic number.

64409667 is a deficient number, since it is larger than the sum of its proper divisors (39253269).

64409667 is a wasteful number, since it uses less digits than its factorization.

64409667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 64409667 is about 8025.5633447129. The cubic root of 64409667 is about 400.8516583250.

The spelling of 64409667 in words is "sixty-four million, four hundred nine thousand, six hundred sixty-seven".