660263541 has 16 divisors (see below), whose sum is σ = 1006919808. Its totient is φ = 376992000.

The previous prime is 660263537. The next prime is 660263579. The reversal of 660263541 is 145362066.

It is not a de Polignac number, because 660263541 - 2² = 660263537 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660263501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15841 + ... + 39641.

It is an arithmetic number, because the mean of its divisors is an integer number (62932488).

Almost surely, 2^660263541 is an apocalyptic number.

It is an amenable number.

660263541 is a deficient number, since it is larger than the sum of its proper divisors (346656267).

660263541 is a wasteful number, since it uses less digits than its factorization.

660263541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25132.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 660263541 is about 25695.5938051643. The cubic root of 660263541 is about 870.7746396975.

The spelling of 660263541 in words is "six hundred sixty million, two hundred sixty-three thousand, five hundred forty-one".