966421951 has 4 divisors (see below), whose sum is σ = 1054278504. Its totient is φ = 878565400.

The previous prime is 966421913. The next prime is 966421957. The reversal of 966421951 is 159124669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159124669 = 11 ⋅14465879.

It is a cyclic number.

It is not a de Polignac number, because 966421951 - 2¹⁹ = 965897663 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 966421898 and 966421907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966421957) 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, 43928260 + ... + 43928281.

It is an arithmetic number, because the mean of its divisors is an integer number (263569626).

Almost surely, 2^966421951 is an apocalyptic number.

966421951 is a deficient number, since it is larger than the sum of its proper divisors (87856553).

966421951 is a wasteful number, since it uses less digits than its factorization.

966421951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87856552.

The product of its digits is 116640, while the sum is 43.

The square root of 966421951 is about 31087.3278201907. The cubic root of 966421951 is about 988.6796502504.

The spelling of 966421951 in words is "nine hundred sixty-six million, four hundred twenty-one thousand, nine hundred fifty-one".