67020420086665 has 12 divisors (see below), whose sum is σ = 82656886257036. Its totient is φ = 52167245899968.

The previous prime is 67020420086647. The next prime is 67020420086693. The reversal of 67020420086665 is 56668002402076.

It can be written as a sum of positive squares in 6 ways, for example, as 9334815315849 + 57685604770816 = 3055293^2 + 7595104^2 .

It is not a de Polignac number, because 67020420086665 - 2⁹ = 67020420086153 is a prime.

It is a super-2 number, since 2×67020420086665² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4895568034 + ... + 4895581723.

It is an arithmetic number, because the mean of its divisors is an integer number (6888073854753).

Almost surely, 2^{67020420086665} is an apocalyptic number.

It is an amenable number.

67020420086665 is a deficient number, since it is larger than the sum of its proper divisors (15636466170371).

67020420086665 is an equidigital number, since it uses as much as digits as its factorization.

67020420086665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9791149836 (or 9791149799 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 67020420086665 in words is "sixty-seven trillion, twenty billion, four hundred twenty million, eighty-six thousand, six hundred sixty-five".