1663426079 has 48 divisors (see below), whose sum is σ = 2145242880. Its totient is φ = 1279998720.

The previous prime is 1663426069. The next prime is 1663426099. The reversal of 1663426079 is 9706243661.

It is not a de Polignac number, because 1663426079 - 2⁸ = 1663425823 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663426069) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2804807 + ... + 2805399.

It is an arithmetic number, because the mean of its divisors is an integer number (44692560).

Almost surely, 2^1663426079 is an apocalyptic number.

1663426079 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1663426079 is a deficient number, since it is larger than the sum of its proper divisors (481816801).

1663426079 is a wasteful number, since it uses less digits than its factorization.

1663426079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 1663426079 is about 40785.1208040383. The cubic root of 1663426079 is about 1184.8621746212.

The spelling of 1663426079 in words is "one billion, six hundred sixty-three million, four hundred twenty-six thousand, seventy-nine".