78366466 has 8 divisors (see below), whose sum is σ = 118408140. Its totient is φ = 38897088.

The previous prime is 78366461. The next prime is 78366473. The reversal of 78366466 is 66466387.

It can be written as a sum of positive squares in 2 ways, for example, as 72505225 + 5861241 = 8515^2 + 2421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78366466² = 12282605986658312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78366461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142731 + ... + 143278.

Almost surely, 2^78366466 is an apocalyptic number.

78366466 is a deficient number, since it is larger than the sum of its proper divisors (40041674).

78366466 is a wasteful number, since it uses less digits than its factorization.

78366466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286148.

The product of its digits is 870912, while the sum is 46.

The square root of 78366466 is about 8852.4836063107. The cubic root of 78366466 is about 427.9339614825.

The spelling of 78366466 in words is "seventy-eight million, three hundred sixty-six thousand, four hundred sixty-six".