665461699 has 12 divisors (see below), whose sum is σ = 774916824. Its totient is φ = 569800224.

The previous prime is 665461669. The next prime is 665461703. The reversal of 665461699 is 996164566.

665461699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665461699 - 2⁷ = 665461571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665461609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44044 + ... + 57190.

It is an arithmetic number, because the mean of its divisors is an integer number (64576402).

Almost surely, 2^665461699 is an apocalyptic number.

665461699 is a deficient number, since it is larger than the sum of its proper divisors (109455125).

665461699 is a wasteful number, since it uses less digits than its factorization.

665461699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14194 (or 14187 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 52.

The square root of 665461699 is about 25796.5443228352. The cubic root of 665461699 is about 873.0538292122.

The spelling of 665461699 in words is "six hundred sixty-five million, four hundred sixty-one thousand, six hundred ninety-nine".