664232077 has 8 divisors (see below), whose sum is σ = 699672960. Its totient is φ = 628839360.

The previous prime is 664232057. The next prime is 664232083. The reversal of 664232077 is 770232466.

It is a happy number.

664232077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 664232077 - 2⁷ = 664231949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664232027) 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, 18252 + ... + 40762.

It is an arithmetic number, because the mean of its divisors is an integer number (87459120).

Almost surely, 2^664232077 is an apocalyptic number.

It is an amenable number.

664232077 is a deficient number, since it is larger than the sum of its proper divisors (35440883).

664232077 is a wasteful number, since it uses less digits than its factorization.

664232077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24083.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 664232077 is about 25772.7002271784. The cubic root of 664232077 is about 872.5157626400.

The spelling of 664232077 in words is "six hundred sixty-four million, two hundred thirty-two thousand, seventy-seven".