662749905 has 16 divisors (see below), whose sum is σ = 1096966080. Its totient is φ = 341277888.

The previous prime is 662749897. The next prime is 662749931. The reversal of 662749905 is 509947266.

It is not a de Polignac number, because 662749905 - 2³ = 662749897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761347 + ... + 762216.

It is an arithmetic number, because the mean of its divisors is an integer number (68560380).

Almost surely, 2^662749905 is an apocalyptic number.

It is an amenable number.

662749905 is a deficient number, since it is larger than the sum of its proper divisors (434216175).

662749905 is a wasteful number, since it uses less digits than its factorization.

662749905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523600.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 662749905 is about 25743.9294786169. The cubic root of 662749905 is about 871.8663001149.

The spelling of 662749905 in words is "six hundred sixty-two million, seven hundred forty-nine thousand, nine hundred five".