66020167 has 4 divisors (see below), whose sum is σ = 66040920. Its totient is φ = 65999416.

The previous prime is 66020161. The next prime is 66020183. The reversal of 66020167 is 76102066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76102066 = 2 ⋅38051033.

It is a cyclic number.

It is not a de Polignac number, because 66020167 - 2³ = 66020159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66020161) 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 in 3 ways as a sum of consecutive naturals, for example, 4492 + ... + 12337.

It is an arithmetic number, because the mean of its divisors is an integer number (16510230).

Almost surely, 2^66020167 is an apocalyptic number.

66020167 is a deficient number, since it is larger than the sum of its proper divisors (20753).

66020167 is a wasteful number, since it uses less digits than its factorization.

66020167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20752.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 66020167 is about 8125.2795028848. The cubic root of 66020167 is about 404.1651593288.

It can be divided in two parts, 660 and 20167, that multiplied together give a triangular number (13310220 = T₅₁₅₉).

The spelling of 66020167 in words is "sixty-six million, twenty thousand, one hundred sixty-seven".