2660555551 has 8 divisors (see below), whose sum is σ = 2670935904. Its totient is φ = 2650187520.

The previous prime is 2660555519. The next prime is 2660555561. The reversal of 2660555551 is 1555550662.

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 2660555551 - 2⁵ = 2660555519 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 (2660555561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899491 + ... + 902443.

It is an arithmetic number, because the mean of its divisors is an integer number (333866988).

Almost surely, 2^2660555551 is an apocalyptic number.

2660555551 is a deficient number, since it is larger than the sum of its proper divisors (10380353).

2660555551 is a wasteful number, since it uses less digits than its factorization.

2660555551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6161.

The product of its (nonzero) digits is 225000, while the sum is 40.

The square root of 2660555551 is about 51580.5733876621. The cubic root of 2660555551 is about 1385.6624357427.

The spelling of 2660555551 in words is "two billion, six hundred sixty million, five hundred fifty-five thousand, five hundred fifty-one".