660376537 has 2 divisors, whose sum is σ = 660376538. Its totient is φ = 660376536.

The previous prime is 660376523. The next prime is 660376547. The reversal of 660376537 is 735673066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476068761 + 184307776 = 21819^2 + 13576^2 .

It is a cyclic number.

It is not a de Polignac number, because 660376537 - 2²³ = 651987929 is a prime.

It is a super-2 number, since 2×660376537² = 872194341240224738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660376493 and 660376502.

It is not a weakly prime, because it can be changed into another prime (660376547) 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 as a sum of consecutive naturals, namely, 330188268 + 330188269.

It is an arithmetic number, because the mean of its divisors is an integer number (330188269).

Almost surely, 2^660376537 is an apocalyptic number.

It is an amenable number.

660376537 is a deficient number, since it is larger than the sum of its proper divisors (1).

660376537 is an equidigital number, since it uses as much as digits as its factorization.

660376537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 43.

The square root of 660376537 is about 25697.7924538276. The cubic root of 660376537 is about 870.8243109942.

The spelling of 660376537 in words is "six hundred sixty million, three hundred seventy-six thousand, five hundred thirty-seven".