966691687 has 4 divisors (see below), whose sum is σ = 1041052600. Its totient is φ = 892330776.

The previous prime is 966691657. The next prime is 966691697. The reversal of 966691687 is 786196669.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 966691687 - 2¹⁹ = 966167399 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 (966691657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37180437 + ... + 37180462.

It is an arithmetic number, because the mean of its divisors is an integer number (260263150).

Almost surely, 2^966691687 is an apocalyptic number.

966691687 is a deficient number, since it is larger than the sum of its proper divisors (74360913).

966691687 is a wasteful number, since it uses less digits than its factorization.

966691687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74360912.

The product of its digits is 5878656, while the sum is 58.

The square root of 966691687 is about 31091.6658768873. The cubic root of 966691687 is about 988.7716244605.

The spelling of 966691687 in words is "nine hundred sixty-six million, six hundred ninety-one thousand, six hundred eighty-seven".