74648681 has 4 divisors (see below), whose sum is σ = 75024000. Its totient is φ = 74273364.

The previous prime is 74648677. The next prime is 74648687. The reversal of 74648681 is 18684647.

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 74648681 - 2² = 74648677 is a prime.

It is a super-2 number, since 2×74648681² = 11144851150079522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74648687) 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, 187361 + ... + 187758.

It is an arithmetic number, because the mean of its divisors is an integer number (18756000).

Almost surely, 2^74648681 is an apocalyptic number.

It is an amenable number.

74648681 is a deficient number, since it is larger than the sum of its proper divisors (375319).

74648681 is a wasteful number, since it uses less digits than its factorization.

74648681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375318.

The product of its digits is 258048, while the sum is 44.

The square root of 74648681 is about 8639.9468169659. The cubic root of 74648681 is about 421.0568264327.

The spelling of 74648681 in words is "seventy-four million, six hundred forty-eight thousand, six hundred eighty-one".