78723066 has 32 divisors (see below), whose sum is σ = 166013568. Its totient is φ = 24837120.

The previous prime is 78723059. The next prime is 78723091. The reversal of 78723066 is 66032787.

It is a super-2 number, since 2×78723066² = 12394642240880712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10446 + ... + 16326.

It is an arithmetic number, because the mean of its divisors is an integer number (5187924).

Almost surely, 2^78723066 is an apocalyptic number.

78723066 is an abundant number, since it is smaller than the sum of its proper divisors (87290502).

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

78723066 is a wasteful number, since it uses less digits than its factorization.

78723066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6006.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 78723066 is about 8872.6019858889. The cubic root of 78723066 is about 428.5820718944.

The spelling of 78723066 in words is "seventy-eight million, seven hundred twenty-three thousand, sixty-six".