966772661 has 8 divisors (see below), whose sum is σ = 997483200. Its totient is φ = 936401760.

The previous prime is 966772637. The next prime is 966772663. The reversal of 966772661 is 166277669.

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 966772661 - 2¹⁴ = 966756277 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 (966772663) 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, 79121 + ... + 90518.

It is an arithmetic number, because the mean of its divisors is an integer number (124685400).

Almost surely, 2^966772661 is an apocalyptic number.

It is an amenable number.

966772661 is a deficient number, since it is larger than the sum of its proper divisors (30710539).

966772661 is a wasteful number, since it uses less digits than its factorization.

966772661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169819.

The product of its digits is 1143072, while the sum is 50.

The square root of 966772661 is about 31092.9680313733. The cubic root of 966772661 is about 988.7992315246.

It can be divided in two parts, 9667 and 72661, that added together give a palindrome (82328).

The spelling of 966772661 in words is "nine hundred sixty-six million, seven hundred seventy-two thousand, six hundred sixty-one".