66216001575 has 12 divisors (see below), whose sum is σ = 109477122728. Its totient is φ = 35315200800.

The previous prime is 66216001567. The next prime is 66216001601. The reversal of 66216001575 is 57510061266.

It is not a de Polignac number, because 66216001575 - 2³ = 66216001567 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 11 ways as a sum of consecutive naturals, for example, 441439936 + ... + 441440085.

Almost surely, 2^66216001575 is an apocalyptic number.

66216001575 is a deficient number, since it is larger than the sum of its proper divisors (43261121153).

66216001575 is a wasteful number, since it uses less digits than its factorization.

66216001575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882880034 (or 882880029 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 66216001575 in words is "sixty-six billion, two hundred sixteen million, one thousand, five hundred seventy-five".