1663042953 has 16 divisors (see below), whose sum is σ = 2605046976. Its totient is φ = 930373440.

The previous prime is 1663042951. The next prime is 1663042973. The reversal of 1663042953 is 3592403661.

It is not a de Polignac number, because 1663042953 - 2¹ = 1663042951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1663042951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1937850 + ... + 1938707.

It is an arithmetic number, because the mean of its divisors is an integer number (162815436).

Almost surely, 2^1663042953 is an apocalyptic number.

1663042953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1663042953 is a deficient number, since it is larger than the sum of its proper divisors (942004023).

1663042953 is a wasteful number, since it uses less digits than its factorization.

1663042953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876584.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 1663042953 is about 40780.4236490991. The cubic root of 1663042953 is about 1184.7712004630.

The spelling of 1663042953 in words is "one billion, six hundred sixty-three million, forty-two thousand, nine hundred fifty-three".