660374761 has 2 divisors, whose sum is σ = 660374762. Its totient is φ = 660374760.

The previous prime is 660374731. The next prime is 660374807. The reversal of 660374761 is 167473066.

660374761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 447068736 + 213306025 = 21144^2 + 14605^2 .

It is a cyclic number.

It is not a de Polignac number, because 660374761 - 2²⁵ = 626820329 is a prime.

It is not a weakly prime, because it can be changed into another prime (660374711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330187380 + 330187381.

It is an arithmetic number, because the mean of its divisors is an integer number (330187381).

Almost surely, 2^660374761 is an apocalyptic number.

It is an amenable number.

660374761 is a deficient number, since it is larger than the sum of its proper divisors (1).

660374761 is an equidigital number, since it uses as much as digits as its factorization.

660374761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 660374761 is about 25697.7578983070. The cubic root of 660374761 is about 870.8235303359.

The spelling of 660374761 in words is "six hundred sixty million, three hundred seventy-four thousand, seven hundred sixty-one".