662660251 has 6 divisors (see below), whose sum is σ = 728378756. Its totient is φ = 602418300.

The previous prime is 662660209. The next prime is 662660261. The reversal of 662660251 is 152066266.

It is not a de Polignac number, because 662660251 - 2¹¹ = 662658203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662660261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2738145 + ... + 2738386.

Almost surely, 2^662660251 is an apocalyptic number.

662660251 is a deficient number, since it is larger than the sum of its proper divisors (65718505).

662660251 is a wasteful number, since it uses less digits than its factorization.

662660251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476553 (or 5476542 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 662660251 is about 25742.1881548558. The cubic root of 662660251 is about 871.8269842153.

The spelling of 662660251 in words is "six hundred sixty-two million, six hundred sixty thousand, two hundred fifty-one".