664677141 has 8 divisors (see below), whose sum is σ = 887979360. Its totient is φ = 442246512.

The previous prime is 664677137. The next prime is 664677151. The reversal of 664677141 is 141776466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664677141 - 2² = 664677137 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 664677093 and 664677102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664677121) 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, 216115 + ... + 219168.

It is an arithmetic number, because the mean of its divisors is an integer number (110997420).

Almost surely, 2^664677141 is an apocalyptic number.

It is an amenable number.

664677141 is a deficient number, since it is larger than the sum of its proper divisors (223302219).

664677141 is a wasteful number, since it uses less digits than its factorization.

664677141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435795.

The product of its digits is 169344, while the sum is 42.

The square root of 664677141 is about 25781.3331889567. Note that the first 3 decimals coincide. The cubic root of 664677141 is about 872.7105934677.

The spelling of 664677141 in words is "six hundred sixty-four million, six hundred seventy-seven thousand, one hundred forty-one".