1663746132 has 12 divisors (see below), whose sum is σ = 3882074336. Its totient is φ = 554582040.

The previous prime is 1663746131. The next prime is 1663746163. The reversal of 1663746132 is 2316473661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1663746132² = 5536102383489922848, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) 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 (1663746131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69322744 + ... + 69322767.

Almost surely, 2^1663746132 is an apocalyptic number.

1663746132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1663746132 is an abundant number, since it is smaller than the sum of its proper divisors (2218328204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1663746132 is a wasteful number, since it uses less digits than its factorization.

1663746132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138645518 (or 138645516 counting only the distinct ones).

The product of its digits is 108864, while the sum is 39.

The square root of 1663746132 is about 40789.0442643610. The cubic root of 1663746132 is about 1184.9381612410.

The spelling of 1663746132 in words is "one billion, six hundred sixty-three million, seven hundred forty-six thousand, one hundred thirty-two".