978066446479 has 2 divisors, whose sum is σ = 978066446480. Its totient is φ = 978066446478.

The previous prime is 978066446453. The next prime is 978066446491. The reversal of 978066446479 is 974644660879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978066446479 - 2³¹ = 975918962831 is a prime.

It is a super-2 number, since 2×978066446479² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978066446419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489033223239 + 489033223240.

It is an arithmetic number, because the mean of its divisors is an integer number (489033223240).

Almost surely, 2^978066446479 is an apocalyptic number.

978066446479 is a deficient number, since it is larger than the sum of its proper divisors (1).

978066446479 is an equidigital number, since it uses as much as digits as its factorization.

978066446479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 438939648, while the sum is 70.

The spelling of 978066446479 in words is "nine hundred seventy-eight billion, sixty-six million, four hundred forty-six thousand, four hundred seventy-nine".