66777507465 has 8 divisors (see below), whose sum is σ = 106844011968. Its totient is φ = 35614670640.

The previous prime is 66777507449. The next prime is 66777507473. The reversal of 66777507465 is 56470577766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66777507465 - 2⁴ = 66777507449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66777507399 and 66777507408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2225916901 + ... + 2225916930.

It is an arithmetic number, because the mean of its divisors is an integer number (13355501496).

Almost surely, 2^66777507465 is an apocalyptic number.

It is an amenable number.

66777507465 is a deficient number, since it is larger than the sum of its proper divisors (40066504503).

66777507465 is a wasteful number, since it uses less digits than its factorization.

66777507465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451833839.

The product of its (nonzero) digits is 51861600, while the sum is 60.

The spelling of 66777507465 in words is "sixty-six billion, seven hundred seventy-seven million, five hundred seven thousand, four hundred sixty-five".