623051661 has 8 divisors (see below), whose sum is σ = 839300224. Its totient is φ = 411085440.

The previous prime is 623051659. The next prime is 623051677. The reversal of 623051661 is 166150326.

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

It is not a de Polignac number, because 623051661 - 2¹ = 623051659 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623051651) 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, 1070245 + ... + 1070826.

It is an arithmetic number, because the mean of its divisors is an integer number (104912528).

Almost surely, 2^623051661 is an apocalyptic number.

It is an amenable number.

623051661 is a deficient number, since it is larger than the sum of its proper divisors (216248563).

623051661 is a wasteful number, since it uses less digits than its factorization.

623051661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141171.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 623051661 is about 24961.0028043747. The cubic root of 623051661 is about 854.0986184690.

The spelling of 623051661 in words is "six hundred twenty-three million, fifty-one thousand, six hundred sixty-one".