6779478562 has 4 divisors (see below), whose sum is σ = 10169217846. Its totient is φ = 3389739280.

The previous prime is 6779478557. The next prime is 6779478619. The reversal of 6779478562 is 2658749776.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 6137312281 + 642166281 = 78341^2 + 25341^2 .

It is a super-2 number, since 2×6779478562² = 91922659145235175688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6779478562.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1694869639 + ... + 1694869642.

Almost surely, 2^6779478562 is an apocalyptic number.

6779478562 is a deficient number, since it is larger than the sum of its proper divisors (3389739284).

6779478562 is a wasteful number, since it uses less digits than its factorization.

6779478562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3389739283.

The product of its digits is 35562240, while the sum is 61.

The square root of 6779478562 is about 82337.5889979783. The cubic root of 6779478562 is about 1892.6287396389.

The spelling of 6779478562 in words is "six billion, seven hundred seventy-nine million, four hundred seventy-eight thousand, five hundred sixty-two".