7666325121 has 64 divisors (see below), whose sum is σ = 12979613696. Its totient is φ = 3917548800.

The previous prime is 7666325113. The next prime is 7666325137. The reversal of 7666325121 is 1215236667.

It is not a de Polignac number, because 7666325121 - 2³ = 7666325113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 7666325121.

It is not an unprimeable number, because it can be changed into a prime (7666325111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1112316 + ... + 1119186.

It is an arithmetic number, because the mean of its divisors is an integer number (202806464).

Almost surely, 2^7666325121 is an apocalyptic number.

It is an amenable number.

7666325121 is a deficient number, since it is larger than the sum of its proper divisors (5313288575).

7666325121 is a wasteful number, since it uses less digits than its factorization.

7666325121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022.

The product of its digits is 90720, while the sum is 39.

The square root of 7666325121 is about 87557.5531921718. The cubic root of 7666325121 is about 1971.7979515358.

The spelling of 7666325121 in words is "seven billion, six hundred sixty-six million, three hundred twenty-five thousand, one hundred twenty-one".