7766120121 has 16 divisors (see below), whose sum is σ = 10417837248. Its totient is φ = 5145940800.

The previous prime is 7766120119. The next prime is 7766120123. The reversal of 7766120121 is 1210216677.

It is an interprime number because it is at equal distance from previous prime (7766120119) and next prime (7766120123).

It is not a de Polignac number, because 7766120121 - 2¹ = 7766120119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7766120123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1480315 + ... + 1485551.

It is an arithmetic number, because the mean of its divisors is an integer number (651114828).

Almost surely, 2^7766120121 is an apocalyptic number.

It is an amenable number.

7766120121 is a deficient number, since it is larger than the sum of its proper divisors (2651717127).

7766120121 is a wasteful number, since it uses less digits than its factorization.

7766120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8152.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 7766120121 is about 88125.5928831120. The cubic root of 7766120121 is about 1980.3169340129.

Adding to 7766120121 its reverse (1210216677), we get a palindrome (8976336798).

The spelling of 7766120121 in words is "seven billion, seven hundred sixty-six million, one hundred twenty thousand, one hundred twenty-one".