78266573 has 12 divisors (see below), whose sum is σ = 99322272. Its totient is φ = 60986520.

The previous prime is 78266561. The next prime is 78266597. The reversal of 78266573 is 37566287.

It is not a de Polignac number, because 78266573 - 2⁴ = 78266557 is a prime.

It is a super-2 number, since 2×78266573² = 12251312898328658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78266543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72065 + ... + 73142.

It is an arithmetic number, because the mean of its divisors is an integer number (8276856).

Almost surely, 2^78266573 is an apocalyptic number.

It is an amenable number.

78266573 is a deficient number, since it is larger than the sum of its proper divisors (21055699).

78266573 is a wasteful number, since it uses less digits than its factorization.

78266573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145232 (or 145225 counting only the distinct ones).

The product of its digits is 423360, while the sum is 44.

The square root of 78266573 is about 8846.8397182271. The cubic root of 78266573 is about 427.7520563659.

The spelling of 78266573 in words is "seventy-eight million, two hundred sixty-six thousand, five hundred seventy-three".