655874621 has 8 divisors (see below), whose sum is σ = 668801760. Its totient is φ = 643007952.

The previous prime is 655874587. The next prime is 655874627. The reversal of 655874621 is 126478556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655874621 - 2²² = 651680317 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 (655874627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7106 + ... + 36908.

It is an arithmetic number, because the mean of its divisors is an integer number (83600220).

Almost surely, 2^655874621 is an apocalyptic number.

It is an amenable number.

655874621 is a deficient number, since it is larger than the sum of its proper divisors (12927139).

655874621 is a wasteful number, since it uses less digits than its factorization.

655874621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30235.

The product of its digits is 403200, while the sum is 44.

The square root of 655874621 is about 25610.0492190078. The cubic root of 655874621 is about 868.8409372502.

The spelling of 655874621 in words is "six hundred fifty-five million, eight hundred seventy-four thousand, six hundred twenty-one".