6746261621 has 4 divisors (see below), whose sum is σ = 7359558144. Its totient is φ = 6132965100.

The previous prime is 6746261609. The next prime is 6746261659. The reversal of 6746261621 is 1261626476.

It is a happy number.

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 6746261621 - 2²² = 6742067317 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 (6746260621) 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, 306648245 + ... + 306648266.

It is an arithmetic number, because the mean of its divisors is an integer number (1839889536).

Almost surely, 2^6746261621 is an apocalyptic number.

It is an amenable number.

6746261621 is a deficient number, since it is larger than the sum of its proper divisors (613296523).

6746261621 is a wasteful number, since it uses less digits than its factorization.

6746261621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613296522.

The product of its digits is 145152, while the sum is 41.

The square root of 6746261621 is about 82135.6294247509. The cubic root of 6746261621 is about 1889.5326169021.

The spelling of 6746261621 in words is "six billion, seven hundred forty-six million, two hundred sixty-one thousand, six hundred twenty-one".