661601114 has 4 divisors (see below), whose sum is σ = 992401674. Its totient is φ = 330800556.

The previous prime is 661601089. The next prime is 661601119. The reversal of 661601114 is 411106166.

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., 661261225 + 339889 = 25715^2 + 583^2 .

It is not an unprimeable number, because it can be changed into a prime (661601119) 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 as a sum of consecutive naturals, namely, 165400277 + ... + 165400280.

Almost surely, 2^661601114 is an apocalyptic number.

661601114 is a deficient number, since it is larger than the sum of its proper divisors (330800560).

661601114 is a wasteful number, since it uses less digits than its factorization.

661601114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330800559.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 661601114 is about 25721.6079201904. The cubic root of 661601114 is about 871.3622530532.

The spelling of 661601114 in words is "six hundred sixty-one million, six hundred one thousand, one hundred fourteen".