74117661 has 12 divisors (see below), whose sum is σ = 103309248. Its totient is φ = 47262424.

The previous prime is 74117657. The next prime is 74117663. The reversal of 74117661 is 16671147.

It is not a de Polignac number, because 74117661 - 2² = 74117657 is a prime.

It is a super-2 number, since 2×74117661² = 10986855344221842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74117663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21765 + ... + 24938.

It is an arithmetic number, because the mean of its divisors is an integer number (8609104).

Almost surely, 2^74117661 is an apocalyptic number.

It is an amenable number.

74117661 is a deficient number, since it is larger than the sum of its proper divisors (29191587).

74117661 is a wasteful number, since it uses less digits than its factorization.

74117661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46752 (or 46729 counting only the distinct ones).

The product of its digits is 7056, while the sum is 33.

The square root of 74117661 is about 8609.1614574243. The cubic root of 74117661 is about 420.0560412748.

The spelling of 74117661 in words is "seventy-four million, one hundred seventeen thousand, six hundred sixty-one".