66057078 has 16 divisors (see below), whose sum is σ = 132209136. Its totient is φ = 22003200.

The previous prime is 66057067. The next prime is 66057113. The reversal of 66057078 is 87075066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7750 + ... + 13862.

It is an arithmetic number, because the mean of its divisors is an integer number (8263071).

Almost surely, 2^66057078 is an apocalyptic number.

66057078 is an abundant number, since it is smaller than the sum of its proper divisors (66152058).

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

66057078 is a wasteful number, since it uses less digits than its factorization.

66057078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7919.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 66057078 is about 8127.5505535186. The cubic root of 66057078 is about 404.2404664234.

The spelling of 66057078 in words is "sixty-six million, fifty-seven thousand, seventy-eight".