664116951 has 8 divisors (see below), whose sum is σ = 937576944. Its totient is φ = 416700800.

The previous prime is 664116941. The next prime is 664116991. The reversal of 664116951 is 159611466.

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 664116951 - 2¹³ = 664108759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664116941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6510900 + ... + 6511001.

It is an arithmetic number, because the mean of its divisors is an integer number (117197118).

Almost surely, 2^664116951 is an apocalyptic number.

664116951 is a deficient number, since it is larger than the sum of its proper divisors (273459993).

664116951 is a wasteful number, since it uses less digits than its factorization.

664116951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13021921.

The product of its digits is 38880, while the sum is 39.

The square root of 664116951 is about 25770.4666430393. The cubic root of 664116951 is about 872.4653510158.

The spelling of 664116951 in words is "six hundred sixty-four million, one hundred sixteen thousand, nine hundred fifty-one".