32666251 has 4 divisors (see below), whose sum is σ = 32901400. Its totient is φ = 32431104.

The previous prime is 32666243. The next prime is 32666261. The reversal of 32666251 is 15266623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15266623 = 1103 ⋅13841.

It is a cyclic number.

It is not a de Polignac number, because 32666251 - 2³ = 32666243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32666261) 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, 117366 + ... + 117643.

It is an arithmetic number, because the mean of its divisors is an integer number (8225350).

Almost surely, 2^32666251 is an apocalyptic number.

32666251 is a deficient number, since it is larger than the sum of its proper divisors (235149).

32666251 is a wasteful number, since it uses less digits than its factorization.

32666251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235148.

The product of its digits is 12960, while the sum is 31.

The square root of 32666251 is about 5715.4397031200. The cubic root of 32666251 is about 319.6684423933.

The spelling of 32666251 in words is "thirty-two million, six hundred sixty-six thousand, two hundred fifty-one".