66077257604 has 6 divisors (see below), whose sum is σ = 115635200814. Its totient is φ = 33038628800.

The previous prime is 66077257579. The next prime is 66077257637. The reversal of 66077257604 is 40675277066.

66077257604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 64669507204 + 1407750400 = 254302^2 + 37520^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8259657197 + ... + 8259657204.

It is an arithmetic number, because the mean of its divisors is an integer number (19272533469).

Almost surely, 2^66077257604 is an apocalyptic number.

It is an amenable number.

66077257604 is a deficient number, since it is larger than the sum of its proper divisors (49557943210).

66077257604 is a wasteful number, since it uses less digits than its factorization.

66077257604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16519314405 (or 16519314403 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 50.

The spelling of 66077257604 in words is "sixty-six billion, seventy-seven million, two hundred fifty-seven thousand, six hundred four".