66364633545 has 32 divisors (see below), whose sum is σ = 121472462592. Its totient is φ = 30308120832.

The previous prime is 66364633529. The next prime is 66364633583. The reversal of 66364633545 is 54533646366.

It is not a de Polignac number, because 66364633545 - 2⁴ = 66364633529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205602 + ... + 418331.

It is an arithmetic number, because the mean of its divisors is an integer number (3796014456).

Almost surely, 2^66364633545 is an apocalyptic number.

It is an amenable number.

66364633545 is a deficient number, since it is larger than the sum of its proper divisors (55107829047).

66364633545 is a wasteful number, since it uses less digits than its factorization.

66364633545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624961.

The product of its digits is 13996800, while the sum is 51.

The spelling of 66364633545 in words is "sixty-six billion, three hundred sixty-four million, six hundred thirty-three thousand, five hundred forty-five".