664377471 has 40 divisors (see below), whose sum is σ = 1040840064. Its totient is φ = 421526160.

The previous prime is 664377457. The next prime is 664377479. The reversal of 664377471 is 174773466.

It is not a de Polignac number, because 664377471 - 2¹⁷ = 664246399 is a prime.

It is a super-3 number, since 3×664377471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664377479) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 422116 + ... + 423686.

Almost surely, 2^664377471 is an apocalyptic number.

664377471 is a deficient number, since it is larger than the sum of its proper divisors (376462593).

664377471 is a wasteful number, since it uses less digits than its factorization.

664377471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1824 counting only the distinct ones).

The product of its digits is 592704, while the sum is 45.

The square root of 664377471 is about 25775.5207706847. The cubic root of 664377471 is about 872.5794197594.

The spelling of 664377471 in words is "six hundred sixty-four million, three hundred seventy-seven thousand, four hundred seventy-one".