660881253 has 8 divisors (see below), whose sum is σ = 881296416. Its totient is φ = 440526800.

The previous prime is 660881213. The next prime is 660881293. The reversal of 660881253 is 352188066.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (660881213) and next prime (660881293).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660881253 - 2¹³ = 660873061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660881213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26863 + ... + 45203.

It is an arithmetic number, because the mean of its divisors is an integer number (110162052).

Almost surely, 2^660881253 is an apocalyptic number.

It is an amenable number.

660881253 is a deficient number, since it is larger than the sum of its proper divisors (220415163).

660881253 is a wasteful number, since it uses less digits than its factorization.

660881253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30355.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 660881253 is about 25707.6107991388. The cubic root of 660881253 is about 871.0461072035.

The spelling of 660881253 in words is "six hundred sixty million, eight hundred eighty-one thousand, two hundred fifty-three".