7664615121 has 8 divisors (see below), whose sum is σ = 10820633184. Its totient is φ = 4809170240.

The previous prime is 7664615113. The next prime is 7664615173. The reversal of 7664615121 is 1215164667.

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

It is a cyclic number.

It is not a de Polignac number, because 7664615121 - 2³ = 7664615113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7664615121.

It is not an unprimeable number, because it can be changed into a prime (7664615221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75143235 + ... + 75143336.

It is an arithmetic number, because the mean of its divisors is an integer number (1352579148).

Almost surely, 2^7664615121 is an apocalyptic number.

It is an amenable number.

7664615121 is a deficient number, since it is larger than the sum of its proper divisors (3156018063).

7664615121 is a wasteful number, since it uses less digits than its factorization.

7664615121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150286591.

The product of its digits is 60480, while the sum is 39.

The square root of 7664615121 is about 87547.7876419502. The cubic root of 7664615121 is about 1971.6513352118.

Adding to 7664615121 its reverse (1215164667), we get a palindrome (8879779788).

The spelling of 7664615121 in words is "seven billion, six hundred sixty-four million, six hundred fifteen thousand, one hundred twenty-one".