966231557 has 4 divisors (see below), whose sum is σ = 967162560. Its totient is φ = 965300556.

The previous prime is 966231523. The next prime is 966231559. The reversal of 966231557 is 755132669.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 755132669 = 541 ⋅1395809.

It is a cyclic number.

It is not a de Polignac number, because 966231557 - 2⁶ = 966231493 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 (966231559) 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, 463943 + ... + 466020.

It is an arithmetic number, because the mean of its divisors is an integer number (241790640).

Almost surely, 2^966231557 is an apocalyptic number.

It is an amenable number.

966231557 is a deficient number, since it is larger than the sum of its proper divisors (931003).

966231557 is a wasteful number, since it uses less digits than its factorization.

966231557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931002.

The product of its digits is 340200, while the sum is 44.

The square root of 966231557 is about 31084.2654248094. The cubic root of 966231557 is about 988.6147196625.

The spelling of 966231557 in words is "nine hundred sixty-six million, two hundred thirty-one thousand, five hundred fifty-seven".