66788358 has 32 divisors (see below), whose sum is σ = 164403456. Its totient is φ = 17614368.

The previous prime is 66788299. The next prime is 66788369. The reversal of 66788358 is 85388766.

It is a self number, because there is not a number n which added to its sum of digits gives 66788358.

It is a congruent number.

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, 60616 + ... + 61707.

It is an arithmetic number, because the mean of its divisors is an integer number (5137608).

Almost surely, 2^66788358 is an apocalyptic number.

66788358 is an abundant number, since it is smaller than the sum of its proper divisors (97615098).

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

66788358 is a wasteful number, since it uses less digits than its factorization.

66788358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122348.

The product of its digits is 1935360, while the sum is 51.

The square root of 66788358 is about 8172.4144535137. The cubic root of 66788358 is about 405.7267001638.

The spelling of 66788358 in words is "sixty-six million, seven hundred eighty-eight thousand, three hundred fifty-eight".