78666430 has 8 divisors (see below), whose sum is σ = 141599592. Its totient is φ = 31466568.

The previous prime is 78666421. The next prime is 78666431. The reversal of 78666430 is 3466687.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78666431) 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, 3933312 + ... + 3933331.

It is an arithmetic number, because the mean of its divisors is an integer number (17699949).

Almost surely, 2^78666430 is an apocalyptic number.

78666430 is a deficient number, since it is larger than the sum of its proper divisors (62933162).

78666430 is a wasteful number, since it uses less digits than its factorization.

78666430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7866650.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 78666430 is about 8869.4097887063. The cubic root of 78666430 is about 428.4792684902.

The spelling of 78666430 in words is "seventy-eight million, six hundred sixty-six thousand, four hundred thirty".