1663351251 has 8 divisors (see below), whose sum is σ = 2228947200. Its totient is φ = 1103328072.

The previous prime is 1663351211. The next prime is 1663351297. The reversal of 1663351251 is 1521533661.

1663351251 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1663351251 - 2⁹ = 1663350739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1663351211) 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, 1392495 + ... + 1393688.

It is an arithmetic number, because the mean of its divisors is an integer number (278618400).

Almost surely, 2^1663351251 is an apocalyptic number.

1663351251 is a deficient number, since it is larger than the sum of its proper divisors (565595949).

1663351251 is a wasteful number, since it uses less digits than its factorization.

1663351251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786385.

The product of its digits is 16200, while the sum is 33.

The square root of 1663351251 is about 40784.2034493749. The cubic root of 1663351251 is about 1184.8444076367.

The spelling of 1663351251 in words is "one billion, six hundred sixty-three million, three hundred fifty-one thousand, two hundred fifty-one".