7720434770 has 8 divisors (see below), whose sum is σ = 13896782604. Its totient is φ = 3088173904.

The previous prime is 7720434727. The next prime is 7720434797. The reversal of 7720434770 is 774340277.

It can be written as a sum of positive squares in 2 ways, for example, as 6358308121 + 1362126649 = 79739^2 + 36907^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7720434770² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386021729 + ... + 386021748.

Almost surely, 2^7720434770 is an apocalyptic number.

7720434770 is a deficient number, since it is larger than the sum of its proper divisors (6176347834).

7720434770 is a wasteful number, since it uses less digits than its factorization.

7720434770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772043484.

The product of its (nonzero) digits is 230496, while the sum is 41.

The square root of 7720434770 is about 87866.0046320532. The cubic root of 7720434770 is about 1976.4261254401.

The spelling of 7720434770 in words is "seven billion, seven hundred twenty million, four hundred thirty-four thousand, seven hundred seventy".