30665005 has 32 divisors (see below), whose sum is σ = 43711488. Its totient is φ = 20217600.

The previous prime is 30664999. The next prime is 30665017. The reversal of 30665005 is 50056603.

It is not a de Polignac number, because 30665005 - 2⁵ = 30664973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113020 + ... + 113290.

It is an arithmetic number, because the mean of its divisors is an integer number (1365984).

Almost surely, 2^30665005 is an apocalyptic number.

30665005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30665005 is a deficient number, since it is larger than the sum of its proper divisors (13046483).

30665005 is a wasteful number, since it uses less digits than its factorization.

30665005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 30665005 is about 5537.5992090436. The cubic root of 30665005 is about 313.0024089067.

The spelling of 30665005 in words is "thirty million, six hundred sixty-five thousand, five".