66378636362 has 4 divisors (see below), whose sum is σ = 99567954546. Its totient is φ = 33189318180.

The previous prime is 66378636361. The next prime is 66378636367. The reversal of 66378636362 is 26363687366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34670067601 + 31708568761 = 186199^2 + 178069^2 .

It is a super-2 number, since 2×66378636362² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66378636298 and 66378636307.

It is not an unprimeable number, because it can be changed into a prime (66378636361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16594659089 + ... + 16594659092.

Almost surely, 2^66378636362 is an apocalyptic number.

66378636362 is a deficient number, since it is larger than the sum of its proper divisors (33189318184).

66378636362 is a wasteful number, since it uses less digits than its factorization.

66378636362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33189318183.

The product of its digits is 23514624, while the sum is 56.

The spelling of 66378636362 in words is "sixty-six billion, three hundred seventy-eight million, six hundred thirty-six thousand, three hundred sixty-two".