66692645564 has 6 divisors (see below), whose sum is σ = 116712129744. Its totient is φ = 33346322780.

The previous prime is 66692645563. The next prime is 66692645611. The reversal of 66692645564 is 46554629666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66692645561) 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 as a sum of consecutive naturals, namely, 8336580692 + ... + 8336580699.

It is an arithmetic number, because the mean of its divisors is an integer number (19452021624).

Almost surely, 2^66692645564 is an apocalyptic number.

It is an amenable number.

66692645564 is a deficient number, since it is larger than the sum of its proper divisors (50019484180).

66692645564 is a wasteful number, since it uses less digits than its factorization.

66692645564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16673161395 (or 16673161393 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 59.

The spelling of 66692645564 in words is "sixty-six billion, six hundred ninety-two million, six hundred forty-five thousand, five hundred sixty-four".