660695954 has 4 divisors (see below), whose sum is σ = 991043934. Its totient is φ = 330347976.

The previous prime is 660695927. The next prime is 660695993. The reversal of 660695954 is 459596066.

660695954 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 can be written as a sum of positive squares in only one way, i.e., 399000625 + 261695329 = 19975^2 + 16177^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165173987 + ... + 165173990.

Almost surely, 2^660695954 is an apocalyptic number.

660695954 is a deficient number, since it is larger than the sum of its proper divisors (330347980).

660695954 is a wasteful number, since it uses less digits than its factorization.

660695954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330347979.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The square root of 660695954 is about 25704.0065748513. The cubic root of 660695954 is about 870.9646911351.

The spelling of 660695954 in words is "six hundred sixty million, six hundred ninety-five thousand, nine hundred fifty-four".