77706130 has 8 divisors (see below), whose sum is σ = 139871052. Its totient is φ = 31082448.

The previous prime is 77706107. The next prime is 77706137. The reversal of 77706130 is 3160777.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76720081 + 986049 = 8759^2 + 993^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 77706092 and 77706101.

It is not an unprimeable number, because it can be changed into a prime (77706137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3885297 + ... + 3885316.

Almost surely, 2^77706130 is an apocalyptic number.

77706130 is a deficient number, since it is larger than the sum of its proper divisors (62164922).

77706130 is a wasteful number, since it uses less digits than its factorization.

77706130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7770620.

The product of its (nonzero) digits is 6174, while the sum is 31.

The square root of 77706130 is about 8815.1080537904. The cubic root of 77706130 is about 426.7286090354.

The spelling of 77706130 in words is "seventy-seven million, seven hundred six thousand, one hundred thirty".