664082029 has 4 divisors (see below), whose sum is σ = 715165276. Its totient is φ = 612998784.

The previous prime is 664082021. The next prime is 664082047. The reversal of 664082029 is 920280466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 380328004 + 283754025 = 19502^2 + 16845^2 .

It is a cyclic number.

It is not a de Polignac number, because 664082029 - 2³ = 664082021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664082021) 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, 25541604 + ... + 25541629.

It is an arithmetic number, because the mean of its divisors is an integer number (178791319).

Almost surely, 2^664082029 is an apocalyptic number.

It is an amenable number.

664082029 is a deficient number, since it is larger than the sum of its proper divisors (51083247).

664082029 is a wasteful number, since it uses less digits than its factorization.

664082029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51083246.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 664082029 is about 25769.7890755823. The cubic root of 664082029 is about 872.4500581425.

The spelling of 664082029 in words is "six hundred sixty-four million, eighty-two thousand, twenty-nine".