660747403 has 2 divisors, whose sum is σ = 660747404. Its totient is φ = 660747402.

The previous prime is 660747383. The next prime is 660747419. The reversal of 660747403 is 304747066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660747403 - 2¹⁷ = 660616331 is a prime.

It is not a weakly prime, because it can be changed into another prime (660547403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330373701 + 330373702.

It is an arithmetic number, because the mean of its divisors is an integer number (330373702).

Almost surely, 2^660747403 is an apocalyptic number.

660747403 is a deficient number, since it is larger than the sum of its proper divisors (1).

660747403 is an equidigital number, since it uses as much as digits as its factorization.

660747403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 660747403 is about 25705.0073526541. The cubic root of 660747403 is about 870.9872981548.

The spelling of 660747403 in words is "six hundred sixty million, seven hundred forty-seven thousand, four hundred three".