78266671 has 12 divisors (see below), whose sum is σ = 91769088. Its totient is φ = 66552192.

The previous prime is 78266651. The next prime is 78266693. The reversal of 78266671 is 17666287.

It is not a de Polignac number, because 78266671 - 2⁷ = 78266543 is a prime.

It is a super-2 number, since 2×78266671² = 12251343578844482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78266611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66 + ... + 12511.

It is an arithmetic number, because the mean of its divisors is an integer number (7647424).

Almost surely, 2^78266671 is an apocalyptic number.

78266671 is a deficient number, since it is larger than the sum of its proper divisors (13502417).

78266671 is a wasteful number, since it uses less digits than its factorization.

78266671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12718 (or 12711 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 78266671 is about 8846.8452569263. The cubic root of 78266671 is about 427.7522348997.

The spelling of 78266671 in words is "seventy-eight million, two hundred sixty-six thousand, six hundred seventy-one".