66354874 has 4 divisors (see below), whose sum is σ = 99532314. Its totient is φ = 33177436.

The previous prime is 66354863. The next prime is 66354877. The reversal of 66354874 is 47845366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 60949249 + 5405625 = 7807^2 + 2325^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66354874.

It is not an unprimeable number, because it can be changed into a prime (66354877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16588717 + ... + 16588720.

Almost surely, 2^66354874 is an apocalyptic number.

66354874 is a deficient number, since it is larger than the sum of its proper divisors (33177440).

66354874 is a wasteful number, since it uses less digits than its factorization.

66354874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33177439.

The product of its digits is 483840, while the sum is 43.

The square root of 66354874 is about 8145.8501091046. The cubic root of 66354874 is about 404.8470163445.

The spelling of 66354874 in words is "sixty-six million, three hundred fifty-four thousand, eight hundred seventy-four".