74840661 has 12 divisors (see below), whose sum is σ = 123546592. Its totient is φ = 42766056.

The previous prime is 74840657. The next prime is 74840663. The reversal of 74840661 is 16604847.

It is not a de Polignac number, because 74840661 - 2² = 74840657 is a prime.

It is a super-2 number, since 2×74840661² = 11202249077833842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74840663) 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, 593911 + ... + 594036.

Almost surely, 2^74840661 is an apocalyptic number.

It is an amenable number.

74840661 is a deficient number, since it is larger than the sum of its proper divisors (48705931).

74840661 is a wasteful number, since it uses less digits than its factorization.

74840661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187960 (or 1187957 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 74840661 is about 8651.0497050936. The cubic root of 74840661 is about 421.4174726451.

The spelling of 74840661 in words is "seventy-four million, eight hundred forty thousand, six hundred sixty-one".