78086061 has 6 divisors (see below), whose sum is σ = 112790990. Its totient is φ = 52057368.

The previous prime is 78086059. The next prime is 78086089. The reversal of 78086061 is 16068087.

It can be written as a sum of positive squares in only one way, i.e., 77105961 + 980100 = 8781^2 + 990^2 .

It is not a de Polignac number, because 78086061 - 2¹ = 78086059 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 (78086011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4338106 + ... + 4338123.

Almost surely, 2^78086061 is an apocalyptic number.

It is an amenable number.

78086061 is a deficient number, since it is larger than the sum of its proper divisors (34704929).

78086061 is a wasteful number, since it uses less digits than its factorization.

78086061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8676235 (or 8676232 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 78086061 is about 8836.6317678174. The cubic root of 78086061 is about 427.4229511291.

The spelling of 78086061 in words is "seventy-eight million, eighty-six thousand, sixty-one".