7779799474 has 4 divisors (see below), whose sum is σ = 11669699214. Its totient is φ = 3889899736.

The previous prime is 7779799429. The next prime is 7779799481. The reversal of 7779799474 is 4749979777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4749979777 = 21803 ⋅217859.

It can be written as a sum of positive squares in only one way, i.e., 6989796025 + 790003449 = 83605^2 + 28107^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1944949867 + ... + 1944949870.

Almost surely, 2^7779799474 is an apocalyptic number.

7779799474 is a deficient number, since it is larger than the sum of its proper divisors (3889899740).

7779799474 is a wasteful number, since it uses less digits than its factorization.

7779799474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889899739.

The product of its digits is 196036848, while the sum is 70.

The square root of 7779799474 is about 88203.1715642924. The cubic root of 7779799474 is about 1981.4789713523.

The spelling of 7779799474 in words is "seven billion, seven hundred seventy-nine million, seven hundred ninety-nine thousand, four hundred seventy-four".