66532787 has 2 divisors, whose sum is σ = 66532788. Its totient is φ = 66532786.

The previous prime is 66532769. The next prime is 66532793. The reversal of 66532787 is 78723566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66532787 - 2¹⁶ = 66467251 is a prime.

It is a super-2 number, since 2×66532787² = 8853223491974738, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66532087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33266393 + 33266394.

It is an arithmetic number, because the mean of its divisors is an integer number (33266394).

Almost surely, 2^66532787 is an apocalyptic number.

66532787 is a deficient number, since it is larger than the sum of its proper divisors (1).

66532787 is an equidigital number, since it uses as much as digits as its factorization.

66532787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 44.

The square root of 66532787 is about 8156.7632673751. The cubic root of 66532787 is about 405.2085234167.

The spelling of 66532787 in words is "sixty-six million, five hundred thirty-two thousand, seven hundred eighty-seven".