74664978 has 8 divisors (see below), whose sum is σ = 149329968. Its totient is φ = 24888324.

The previous prime is 74664973. The next prime is 74664979. The reversal of 74664978 is 87946647.

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

74664978 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 74664978.

It is not an unprimeable number, because it can be changed into a prime (74664973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6222076 + ... + 6222087.

It is an arithmetic number, because the mean of its divisors is an integer number (18666246).

Almost surely, 2^74664978 is an apocalyptic number.

74664978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

74664978 is a wasteful number, since it uses less digits than its factorization.

74664978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12444168.

The product of its digits is 2032128, while the sum is 51.

The square root of 74664978 is about 8640.8898847283. The cubic root of 74664978 is about 421.0874653478.

It can be divided in two parts, 7 and 4664978, that added together give a triangular number (4664985 = T₃₀₅₄).

The spelling of 74664978 in words is "seventy-four million, six hundred sixty-four thousand, nine hundred seventy-eight".