664650371 has 8 divisors (see below), whose sum is σ = 828655104. Its totient is φ = 517909320.

The previous prime is 664650367. The next prime is 664650373. The reversal of 664650371 is 173056466.

It is a happy number.

664650371 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 664650371 - 2² = 664650367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664650373) 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, 4315835 + ... + 4315988.

It is an arithmetic number, because the mean of its divisors is an integer number (103581888).

Almost surely, 2^664650371 is an apocalyptic number.

664650371 is a deficient number, since it is larger than the sum of its proper divisors (164004733).

664650371 is a wasteful number, since it uses less digits than its factorization.

664650371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8631841.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 664650371 is about 25780.8140096468. The cubic root of 664650371 is about 872.6988771146.

The spelling of 664650371 in words is "six hundred sixty-four million, six hundred fifty thousand, three hundred seventy-one".