660261743 has 16 divisors (see below), whose sum is σ = 685670400. Its totient is φ = 635434080.

The previous prime is 660261739. The next prime is 660261787. The reversal of 660261743 is 347162066.

It is a cyclic number.

It is not a de Polignac number, because 660261743 - 2² = 660261739 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 (660261733) 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 15 ways as a sum of consecutive naturals, for example, 1378178 + ... + 1378656.

It is an arithmetic number, because the mean of its divisors is an integer number (42854400).

Almost surely, 2^660261743 is an apocalyptic number.

660261743 is a deficient number, since it is larger than the sum of its proper divisors (25408657).

660261743 is a wasteful number, since it uses less digits than its factorization.

660261743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 660261743 is about 25695.5588185974. The cubic root of 660261743 is about 870.7738492787.

The spelling of 660261743 in words is "six hundred sixty million, two hundred sixty-one thousand, seven hundred forty-three".