660662351 has 4 divisors (see below), whose sum is σ = 660837672. Its totient is φ = 660487032.

The previous prime is 660662339. The next prime is 660662383. The reversal of 660662351 is 153266066.

660662351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 660662351 - 2⁶ = 660662287 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 (660662251) 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, 81881 + ... + 89586.

It is an arithmetic number, because the mean of its divisors is an integer number (165209418).

Almost surely, 2^660662351 is an apocalyptic number.

660662351 is a deficient number, since it is larger than the sum of its proper divisors (175321).

660662351 is a wasteful number, since it uses less digits than its factorization.

660662351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175320.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 660662351 is about 25703.3529135792. The cubic root of 660662351 is about 870.9499251284.

The spelling of 660662351 in words is "six hundred sixty million, six hundred sixty-two thousand, three hundred fifty-one".