660754551 has 16 divisors (see below), whose sum is σ = 901632384. Its totient is φ = 430264224.

The previous prime is 660754543. The next prime is 660754663. The reversal of 660754551 is 155457066.

660754551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660754551 - 2³ = 660754543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660754541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26940 + ... + 45246.

It is an arithmetic number, because the mean of its divisors is an integer number (56352024).

Almost surely, 2^660754551 is an apocalyptic number.

660754551 is a deficient number, since it is larger than the sum of its proper divisors (240877833).

660754551 is a wasteful number, since it uses less digits than its factorization.

660754551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18590.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 660754551 is about 25705.1463913357. The cubic root of 660754551 is about 870.9904389389.

The spelling of 660754551 in words is "six hundred sixty million, seven hundred fifty-four thousand, five hundred fifty-one".