664014667 has 4 divisors (see below), whose sum is σ = 664104736. Its totient is φ = 663924600.

The previous prime is 664014661. The next prime is 664014709. The reversal of 664014667 is 766410466.

It is a happy number.

664014667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664014667 is a prime.

It is a super-2 number, since 2×664014667² = 881830955982241778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664014661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32883 + ... + 49084.

It is an arithmetic number, because the mean of its divisors is an integer number (166026184).

Almost surely, 2^664014667 is an apocalyptic number.

664014667 is a deficient number, since it is larger than the sum of its proper divisors (90069).

664014667 is an equidigital number, since it uses as much as digits as its factorization.

664014667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90068.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 664014667 is about 25768.4820468727. The cubic root of 664014667 is about 872.4205577869.

The spelling of 664014667 in words is "six hundred sixty-four million, fourteen thousand, six hundred sixty-seven".