4691662621 has 4 divisors (see below), whose sum is σ = 4691807712. Its totient is φ = 4691517532.

The previous prime is 4691662597. The next prime is 4691662643. The reversal of 4691662621 is 1262661964.

4691662621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4691662621 - 2²¹ = 4689565469 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 (4691662421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426 + ... + 96868.

It is an arithmetic number, because the mean of its divisors is an integer number (1172951928).

Almost surely, 2^4691662621 is an apocalyptic number.

It is an amenable number.

4691662621 is a deficient number, since it is larger than the sum of its proper divisors (145091).

4691662621 is an equidigital number, since it uses as much as digits as its factorization.

4691662621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145090.

The product of its digits is 186624, while the sum is 43.

The square root of 4691662621 is about 68495.7124278593. The cubic root of 4691662621 is about 1674.0776234199.

The spelling of 4691662621 in words is "four billion, six hundred ninety-one million, six hundred sixty-two thousand, six hundred twenty-one".