78566741 has 16 divisors (see below), whose sum is σ = 93685248. Its totient is φ = 65049600.

The previous prime is 78566737. The next prime is 78566749. The reversal of 78566741 is 14766587.

It is not a de Polignac number, because 78566741 - 2² = 78566737 is a prime.

It is a super-2 number, since 2×78566741² = 12345465582722162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78566692 and 78566701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78566749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 980 + ... + 12573.

It is an arithmetic number, because the mean of its divisors is an integer number (5855328).

Almost surely, 2^78566741 is an apocalyptic number.

It is an amenable number.

78566741 is a deficient number, since it is larger than the sum of its proper divisors (15118507).

78566741 is a wasteful number, since it uses less digits than its factorization.

78566741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13612.

The product of its digits is 282240, while the sum is 44.

The square root of 78566741 is about 8863.7881856461. The cubic root of 78566741 is about 428.2981970738.

The spelling of 78566741 in words is "seventy-eight million, five hundred sixty-six thousand, seven hundred forty-one".