74783666 has 4 divisors (see below), whose sum is σ = 112175502. Its totient is φ = 37391832.

The previous prime is 74783651. The next prime is 74783669. The reversal of 74783666 is 66638747.

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., 50822641 + 23961025 = 7129^2 + 4895^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 74783666.

It is not an unprimeable number, because it can be changed into a prime (74783669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18695915 + ... + 18695918.

Almost surely, 2^74783666 is an apocalyptic number.

74783666 is a deficient number, since it is larger than the sum of its proper divisors (37391836).

74783666 is a wasteful number, since it uses less digits than its factorization.

74783666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37391835.

The product of its digits is 1016064, while the sum is 47.

The square root of 74783666 is about 8647.7549687766. The cubic root of 74783666 is about 421.3104684745.

The spelling of 74783666 in words is "seventy-four million, seven hundred eighty-three thousand, six hundred sixty-six".