30666251 has 16 divisors (see below), whose sum is σ = 38361600. Its totient is φ = 23815680.

The previous prime is 30666241. The next prime is 30666257. The reversal of 30666251 is 15266603.

It is not a de Polignac number, because 30666251 - 2⁶ = 30666187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30666257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34130 + ... + 35016.

It is an arithmetic number, because the mean of its divisors is an integer number (2397600).

Almost surely, 2^30666251 is an apocalyptic number.

30666251 is a deficient number, since it is larger than the sum of its proper divisors (7695349).

30666251 is a wasteful number, since it uses less digits than its factorization.

30666251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 30666251 is about 5537.7117115285. The cubic root of 30666251 is about 313.0066482203.

The spelling of 30666251 in words is "thirty million, six hundred sixty-six thousand, two hundred fifty-one".