77660771 has 8 divisors (see below), whose sum is σ = 81873600. Its totient is φ = 73460520.

The previous prime is 77660767. The next prime is 77660773. The reversal of 77660771 is 17706677.

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 77660771 - 2² = 77660767 is a prime.

It is a super-3 number, since 3×77660771³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77660773) 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, 11276 + ... + 16806.

It is an arithmetic number, because the mean of its divisors is an integer number (10234200).

Almost surely, 2^77660771 is an apocalyptic number.

77660771 is a deficient number, since it is larger than the sum of its proper divisors (4212829).

77660771 is a wasteful number, since it uses less digits than its factorization.

77660771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6289.

The product of its (nonzero) digits is 86436, while the sum is 41.

The square root of 77660771 is about 8812.5348793636. The cubic root of 77660771 is about 426.6455621750.

The spelling of 77660771 in words is "seventy-seven million, six hundred sixty thousand, seven hundred seventy-one".