664189029 has 24 divisors (see below), whose sum is σ = 1107305472. Its totient is φ = 375775200.

The previous prime is 664189003. The next prime is 664189033. The reversal of 664189029 is 920981466.

It is a happy number.

It is not a de Polignac number, because 664189029 - 2⁸ = 664188773 is a prime.

It is a super-2 number, since 2×664189029² = 882294132487925682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664189069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45829 + ... + 58554.

It is an arithmetic number, because the mean of its divisors is an integer number (46137728).

Almost surely, 2^664189029 is an apocalyptic number.

It is an amenable number.

664189029 is a deficient number, since it is larger than the sum of its proper divisors (443116443).

664189029 is a wasteful number, since it uses less digits than its factorization.

664189029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104497 (or 104494 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 664189029 is about 25771.8650663859. The cubic root of 664189029 is about 872.4969133696.

The spelling of 664189029 in words is "six hundred sixty-four million, one hundred eighty-nine thousand, twenty-nine".