66016432473215 has 16 divisors (see below), whose sum is σ = 90537093923328. Its totient is φ = 45268274715936.

The previous prime is 66016432473209. The next prime is 66016432473281. The reversal of 66016432473215 is 51237423461066.

It is a cyclic number.

It is not a de Polignac number, because 66016432473215 - 2³⁸ = 65741554566271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9757484 + ... + 15074526.

It is an arithmetic number, because the mean of its divisors is an integer number (5658568370208).

Almost surely, 2^{66016432473215} is an apocalyptic number.

66016432473215 is a deficient number, since it is larger than the sum of its proper divisors (24520661450113).

66016432473215 is a wasteful number, since it uses less digits than its factorization.

66016432473215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5671798.

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 66016432473215 in words is "sixty-six trillion, sixteen billion, four hundred thirty-two million, four hundred seventy-three thousand, two hundred fifteen".