78740061 has 4 divisors (see below), whose sum is σ = 104986752. Its totient is φ = 52493372.

The previous prime is 78740059. The next prime is 78740111. The reversal of 78740061 is 16004787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16004787 = 3 ⋅5334929.

It is a cyclic number.

It is not a de Polignac number, because 78740061 - 2¹ = 78740059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78740021) 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, 13123341 + ... + 13123346.

It is an arithmetic number, because the mean of its divisors is an integer number (26246688).

Almost surely, 2^78740061 is an apocalyptic number.

It is an amenable number.

78740061 is a deficient number, since it is larger than the sum of its proper divisors (26246691).

78740061 is a wasteful number, since it uses less digits than its factorization.

78740061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26246690.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 78740061 is about 8873.5596577698. The cubic root of 78740061 is about 428.6129109212.

The spelling of 78740061 in words is "seventy-eight million, seven hundred forty thousand, sixty-one".