5977966781 has 4 divisors (see below), whose sum is σ = 5998369692. Its totient is φ = 5957563872.

The previous prime is 5977966763. The next prime is 5977966783. The reversal of 5977966781 is 1876697795.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3461439556 + 2516527225 = 58834^2 + 50165^2 .

It is a cyclic number.

It is not a de Polignac number, because 5977966781 - 2¹⁰ = 5977965757 is a prime.

It is a super-2 number, since 2×5977966781² = 71472173669479003922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5977966783) 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, 10201016 + ... + 10201601.

It is an arithmetic number, because the mean of its divisors is an integer number (1499592423).

Almost surely, 2^5977966781 is an apocalyptic number.

It is an amenable number.

5977966781 is a deficient number, since it is larger than the sum of its proper divisors (20402911).

5977966781 is a wasteful number, since it uses less digits than its factorization.

5977966781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20402910.

The product of its digits is 40007520, while the sum is 65.

The square root of 5977966781 is about 77317.3122980875. The cubic root of 5977966781 is about 1814.8935859312.

The spelling of 5977966781 in words is "five billion, nine hundred seventy-seven million, nine hundred sixty-six thousand, seven hundred eighty-one".