78265668 has 24 divisors (see below), whose sum is σ = 196667968. Its totient is φ = 24081696.

The previous prime is 78265661. The next prime is 78265673. The reversal of 78265668 is 86656287.

It is a super-2 number, since 2×78265668² = 12251029574972448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78265661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250696 + ... + 251007.

Almost surely, 2^78265668 is an apocalyptic number.

78265668 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

78265668 is an abundant number, since it is smaller than the sum of its proper divisors (118402300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78265668 is a wasteful number, since it uses less digits than its factorization.

78265668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501723 (or 501721 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 78265668 is about 8846.7885698710. The cubic root of 78265668 is about 427.7504076540.

The spelling of 78265668 in words is "seventy-eight million, two hundred sixty-five thousand, six hundred sixty-eight".