77732086661386 has 4 divisors (see below), whose sum is σ = 116598129992082. Its totient is φ = 38866043330692.

The previous prime is 77732086661351. The next prime is 77732086661387. The reversal of 77732086661386 is 68316668023777.

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., 75623111784025 + 2108974877361 = 8696155^2 + 1452231^2 .

It is not an unprimeable number, because it can be changed into a prime (77732086661387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19433021665345 + ... + 19433021665348.

Almost surely, 2^{77732086661386} is an apocalyptic number.

77732086661386 is a deficient number, since it is larger than the sum of its proper divisors (38866043330696).

77732086661386 is a wasteful number, since it uses less digits than its factorization.

77732086661386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38866043330695.

The product of its (nonzero) digits is 512096256, while the sum is 70.

The spelling of 77732086661386 in words is "seventy-seven trillion, seven hundred thirty-two billion, eighty-six million, six hundred sixty-one thousand, three hundred eighty-six".