74909661 has 4 divisors (see below), whose sum is σ = 99879552. Its totient is φ = 49939772.

The previous prime is 74909651. The next prime is 74909683. The reversal of 74909661 is 16690947.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74909661 - 2⁵ = 74909629 is a prime.

It is a super-2 number, since 2×74909661² = 11222914622269842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74909651) 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, 12484941 + ... + 12484946.

It is an arithmetic number, because the mean of its divisors is an integer number (24969888).

Almost surely, 2^74909661 is an apocalyptic number.

It is an amenable number.

74909661 is a deficient number, since it is larger than the sum of its proper divisors (24969891).

74909661 is a wasteful number, since it uses less digits than its factorization.

74909661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24969890.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 74909661 is about 8655.0367416898. The cubic root of 74909661 is about 421.5469427025.

The spelling of 74909661 in words is "seventy-four million, nine hundred nine thousand, six hundred sixty-one".