2663690421 has 96 divisors (see below), whose sum is σ = 4491417600. Its totient is φ = 1396289664.

The previous prime is 2663690401. The next prime is 2663690429. The reversal of 2663690421 is 1240963662.

2663690421 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2663690421 - 2⁹ = 2663689909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2663690421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2663690429) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13385280 + ... + 13385478.

It is an arithmetic number, because the mean of its divisors is an integer number (46785600).

Almost surely, 2^2663690421 is an apocalyptic number.

2663690421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2663690421 is a deficient number, since it is larger than the sum of its proper divisors (1827727179).

2663690421 is a wasteful number, since it uses less digits than its factorization.

2663690421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 2663690421 is about 51610.9525294777. The cubic root of 2663690421 is about 1386.2064532782.

The spelling of 2663690421 in words is "two billion, six hundred sixty-three million, six hundred ninety thousand, four hundred twenty-one".