78415366 has 8 divisors (see below), whose sum is σ = 119616840. Its totient is φ = 38543088.

The previous prime is 78415343. The next prime is 78415369. The reversal of 78415366 is 66351487.

It is a happy number.

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

It is a super-2 number, since 2×78415366² = 12297939249827912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78415369) 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, 332151 + ... + 332386.

It is an arithmetic number, because the mean of its divisors is an integer number (14952105).

Almost surely, 2^78415366 is an apocalyptic number.

78415366 is a deficient number, since it is larger than the sum of its proper divisors (41201474).

78415366 is a wasteful number, since it uses less digits than its factorization.

78415366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664598.

The product of its digits is 120960, while the sum is 40.

The square root of 78415366 is about 8855.2451123614. The cubic root of 78415366 is about 428.0229520111.

The spelling of 78415366 in words is "seventy-eight million, four hundred fifteen thousand, three hundred sixty-six".