662981761 has 12 divisors (see below), whose sum is σ = 730082160. Its totient is φ = 601601520.

The previous prime is 662981747. The next prime is 662981777. The reversal of 662981761 is 167189266.

It is not a de Polignac number, because 662981761 - 2⁵ = 662981729 is a prime.

It is a super-2 number, since 2×662981761² = 879089630837322242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662981791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23275 + ... + 43216.

It is an arithmetic number, because the mean of its divisors is an integer number (60840180).

Almost surely, 2^662981761 is an apocalyptic number.

It is an amenable number.

662981761 is a deficient number, since it is larger than the sum of its proper divisors (67100399).

662981761 is a wasteful number, since it uses less digits than its factorization.

662981761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66576 (or 66563 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 662981761 is about 25748.4322046994. The cubic root of 662981761 is about 871.9679593093.

The spelling of 662981761 in words is "six hundred sixty-two million, nine hundred eighty-one thousand, seven hundred sixty-one".