660616877 has 8 divisors (see below), whose sum is σ = 669140472. Its totient is φ = 652147200.

The previous prime is 660616841. The next prime is 660616921. The reversal of 660616877 is 778616066.

660616877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 18957316 + 641659561 = 4354^2 + 25331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660616877 - 2¹² = 660612781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660616577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11477 + ... + 38117.

It is an arithmetic number, because the mean of its divisors is an integer number (83642559).

Almost surely, 2^660616877 is an apocalyptic number.

It is an amenable number.

660616877 is a deficient number, since it is larger than the sum of its proper divisors (8523595).

660616877 is a wasteful number, since it uses less digits than its factorization.

660616877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26959.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 660616877 is about 25702.4683055928. The cubic root of 660616877 is about 870.9299419073.

The spelling of 660616877 in words is "six hundred sixty million, six hundred sixteen thousand, eight hundred seventy-seven".