66770494 has 16 divisors (see below), whose sum is σ = 115599456. Its totient is φ = 28332000.

The previous prime is 66770491. The next prime is 66770507. The reversal of 66770494 is 49407766.

It is a self number, because there is not a number n which added to its sum of digits gives 66770494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66770491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22197 + ... + 25024.

It is an arithmetic number, because the mean of its divisors is an integer number (7224966).

Almost surely, 2^66770494 is an apocalyptic number.

66770494 is a deficient number, since it is larger than the sum of its proper divisors (48828962).

66770494 is a wasteful number, since it uses less digits than its factorization.

66770494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47331.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 66770494 is about 8171.3214353616. The cubic root of 66770494 is about 405.6905234593.

The spelling of 66770494 in words is "sixty-six million, seven hundred seventy thousand, four hundred ninety-four".