74669978 has 8 divisors (see below), whose sum is σ = 113841300. Its totient is φ = 36722880.

The previous prime is 74669971. The next prime is 74669993. The reversal of 74669978 is 87996647.

It can be written as a sum of positive squares in 2 ways, for example, as 69772609 + 4897369 = 8353^2 + 2213^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×74669978² = 11151211229040968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74669971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305903 + ... + 306146.

Almost surely, 2^74669978 is an apocalyptic number.

74669978 is a deficient number, since it is larger than the sum of its proper divisors (39171322).

74669978 is a wasteful number, since it uses less digits than its factorization.

74669978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612112.

The product of its digits is 4572288, while the sum is 56.

The square root of 74669978 is about 8641.1792019377. The cubic root of 74669978 is about 421.0968646244.

The spelling of 74669978 in words is "seventy-four million, six hundred sixty-nine thousand, nine hundred seventy-eight".