7720751061 has 48 divisors (see below), whose sum is σ = 12146603200. Its totient is φ = 4833522720.

The previous prime is 7720751057. The next prime is 7720751107. The reversal of 7720751061 is 1601570277.

It is not a de Polignac number, because 7720751061 - 2² = 7720751057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720751011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8803155 + ... + 8804031.

Almost surely, 2^7720751061 is an apocalyptic number.

It is an amenable number.

7720751061 is a deficient number, since it is larger than the sum of its proper divisors (4425852139).

7720751061 is a wasteful number, since it uses less digits than its factorization.

7720751061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 36.

The square root of 7720751061 is about 87867.8044621578. The cubic root of 7720751061 is about 1976.4531151662.

The spelling of 7720751061 in words is "seven billion, seven hundred twenty million, seven hundred fifty-one thousand, sixty-one".