74613661 has 8 divisors (see below), whose sum is σ = 76085240. Its totient is φ = 73156608.

The previous prime is 74613653. The next prime is 74613673. The reversal of 74613661 is 16631647.

It can be written as a sum of positive squares in 4 ways, for example, as 42055225 + 32558436 = 6485^2 + 5706^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 74613661 - 2³ = 74613653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74613631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7045 + ... + 14101.

It is an arithmetic number, because the mean of its divisors is an integer number (9510655).

Almost surely, 2^74613661 is an apocalyptic number.

It is an amenable number.

74613661 is a deficient number, since it is larger than the sum of its proper divisors (1471579).

74613661 is a wasteful number, since it uses less digits than its factorization.

74613661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7263.

The product of its digits is 18144, while the sum is 34.

The square root of 74613661 is about 8637.9199463760. The cubic root of 74613661 is about 420.9909725498.

The spelling of 74613661 in words is "seventy-four million, six hundred thirteen thousand, six hundred sixty-one".