664916046 has 8 divisors (see below), whose sum is σ = 1329832104. Its totient is φ = 221638680.

The previous prime is 664916041. The next prime is 664916081. The reversal of 664916046 is 640619466.

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

664916046 is an admirable number.

It is a super-2 number, since 2×664916046² = 884226696456548232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664915989 and 664916007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664916041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55409665 + ... + 55409676.

It is an arithmetic number, because the mean of its divisors is an integer number (166229013).

Almost surely, 2^664916046 is an apocalyptic number.

664916046 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664916046 is a wasteful number, since it uses less digits than its factorization.

664916046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110819346.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 664916046 is about 25785.9660668357. The cubic root of 664916046 is about 872.8151404408.

The spelling of 664916046 in words is "six hundred sixty-four million, nine hundred sixteen thousand, forty-six".