7777700749 has 16 divisors (see below), whose sum is σ = 10076375680. Its totient is φ = 5829900480.

The previous prime is 7777700747. The next prime is 7777700761. The reversal of 7777700749 is 9470077777.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7777700749 - 2¹ = 7777700747 is a prime.

It is a super-2 number, since 2×7777700749² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7777700749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7777700747) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 2247462 + ... + 2250919.

It is an arithmetic number, because the mean of its divisors is an integer number (629773480).

Almost surely, 2^7777700749 is an apocalyptic number.

It is an amenable number.

7777700749 is a deficient number, since it is larger than the sum of its proper divisors (2298674931).

7777700749 is a wasteful number, since it uses less digits than its factorization.

7777700749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4498420.

The product of its (nonzero) digits is 4235364, while the sum is 55.

The square root of 7777700749 is about 88191.2736556174. The cubic root of 7777700749 is about 1981.3007768084.

The spelling of 7777700749 in words is "seven billion, seven hundred seventy-seven million, seven hundred thousand, seven hundred forty-nine".