66087385 has 32 divisors (see below), whose sum is σ = 98122752. Its totient is φ = 41610240.

The previous prime is 66087383. The next prime is 66087391. The reversal of 66087385 is 58378066.

It is not a de Polignac number, because 66087385 - 2¹ = 66087383 is a prime.

It is a super-2 number, since 2×66087385² = 8735084912276450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66087383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153120 + ... + 153550.

It is an arithmetic number, because the mean of its divisors is an integer number (3066336).

Almost surely, 2^66087385 is an apocalyptic number.

66087385 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66087385 is a deficient number, since it is larger than the sum of its proper divisors (32035367).

66087385 is a wasteful number, since it uses less digits than its factorization.

66087385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 66087385 is about 8129.4148005868. The cubic root of 66087385 is about 404.3022788389.

The spelling of 66087385 in words is "sixty-six million, eighty-seven thousand, three hundred eighty-five".