4611666515551 has 8 divisors (see below), whose sum is σ = 4724366036544. Its totient is φ = 4498977463680.

The previous prime is 4611666515539. The next prime is 4611666515557. The reversal of 4611666515551 is 1555156661164.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4611666515551 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 (4611666515557) 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, 1721815 + ... + 3491128.

It is an arithmetic number, because the mean of its divisors is an integer number (590545754568).

Almost surely, 2^{4611666515551} is an apocalyptic number.

4611666515551 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

4611666515551 is a deficient number, since it is larger than the sum of its proper divisors (112699520993).

4611666515551 is a wasteful number, since it uses less digits than its factorization.

4611666515551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234561.

The product of its digits is 3240000, while the sum is 52.

The spelling of 4611666515551 in words is "four trillion, six hundred eleven billion, six hundred sixty-six million, five hundred fifteen thousand, five hundred fifty-one".