77660077 has 8 divisors (see below), whose sum is σ = 87010272. Its totient is φ = 68691600.

The previous prime is 77660071. The next prime is 77660111. The reversal of 77660077 is 77006677.

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

It is a cyclic number.

It is not a de Polignac number, because 77660077 - 2³ = 77660069 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77660071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94999 + ... + 95812.

It is an arithmetic number, because the mean of its divisors is an integer number (10876284).

Almost surely, 2^77660077 is an apocalyptic number.

It is an amenable number.

77660077 is a deficient number, since it is larger than the sum of its proper divisors (9350195).

77660077 is a wasteful number, since it uses less digits than its factorization.

77660077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190859.

The product of its (nonzero) digits is 86436, while the sum is 40.

The square root of 77660077 is about 8812.4955035450. The cubic root of 77660077 is about 426.6442912935.

It can be divided in two parts, 776600 and 77, that added together give a palindrome (776677).

The spelling of 77660077 in words is "seventy-seven million, six hundred sixty thousand, seventy-seven".