7611666515551 has 8 divisors (see below), whose sum is σ = 8703223673984. Its totient is φ = 6521153414040.

The previous prime is 7611666515549. The next prime is 7611666515561. The reversal of 7611666515551 is 1555156661167.

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 7611666515551 - 2¹ = 7611666515549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7611666515492 and 7611666515501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7611666515521) 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, 260998605 + ... + 261027766.

It is an arithmetic number, because the mean of its divisors is an integer number (1087902959248).

Almost surely, 2^{7611666515551} is an apocalyptic number.

7611666515551 is a deficient number, since it is larger than the sum of its proper divisors (1091557158433).

7611666515551 is a wasteful number, since it uses less digits than its factorization.

7611666515551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522028461.

The product of its digits is 5670000, while the sum is 55.

The spelling of 7611666515551 in words is "seven trillion, six hundred eleven billion, six hundred sixty-six million, five hundred fifteen thousand, five hundred fifty-one".