66975041575 has 12 divisors (see below), whose sum is σ = 89437440568. Its totient is φ = 49458492000.

The previous prime is 66975041557. The next prime is 66975041587. The reversal of 66975041575 is 57514057966.

It is not a de Polignac number, because 66975041575 - 2²⁹ = 66438170663 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, 103038201 + ... + 103038850.

Almost surely, 2^66975041575 is an apocalyptic number.

66975041575 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66975041575 is a deficient number, since it is larger than the sum of its proper divisors (22462398993).

66975041575 is a wasteful number, since it uses less digits than its factorization.

66975041575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206077074 (or 206077069 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 55.

The spelling of 66975041575 in words is "sixty-six billion, nine hundred seventy-five million, forty-one thousand, five hundred seventy-five".