78866061 has 16 divisors (see below), whose sum is σ = 107448000. Its totient is φ = 51442560.

The previous prime is 78866041. The next prime is 78866069. The reversal of 78866061 is 16066887.

It is not a de Polignac number, because 78866061 - 2⁷ = 78865933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78866069) 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, 27315 + ... + 30063.

It is an arithmetic number, because the mean of its divisors is an integer number (6715500).

Almost surely, 2^78866061 is an apocalyptic number.

It is an amenable number.

78866061 is a deficient number, since it is larger than the sum of its proper divisors (28581939).

78866061 is a wasteful number, since it uses less digits than its factorization.

78866061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 78866061 is about 8880.6565635656. The cubic root of 78866061 is about 428.8414114890.

The spelling of 78866061 in words is "seventy-eight million, eight hundred sixty-six thousand, sixty-one".