77436061 has 8 divisors (see below), whose sum is σ = 80227800. Its totient is φ = 74652480.

The previous prime is 77436019. The next prime is 77436067. The reversal of 77436061 is 16063477.

It can be written as a sum of positive squares in 4 ways, for example, as 23707161 + 53728900 = 4869^2 + 7330^2 .

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 77436061 - 2⁷ = 77435933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77436067) 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, 22431 + ... + 25651.

It is an arithmetic number, because the mean of its divisors is an integer number (10028475).

Almost surely, 2^77436061 is an apocalyptic number.

It is an amenable number.

77436061 is a deficient number, since it is larger than the sum of its proper divisors (2791739).

77436061 is a wasteful number, since it uses less digits than its factorization.

77436061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 77436061 is about 8799.7761903358. The cubic root of 77436061 is about 426.2336676433.

The spelling of 77436061 in words is "seventy-seven million, four hundred thirty-six thousand, sixty-one".