1663624969 has 8 divisors (see below), whose sum is σ = 1709152448. Its totient is φ = 1618127280.

The previous prime is 1663624961. The next prime is 1663624973. The reversal of 1663624969 is 9694263661.

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

It is a cyclic number.

It is not a de Polignac number, because 1663624969 - 2³ = 1663624961 is a prime.

It is a super-2 number, since 2×1663624969² = 5535296074960501922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663624961) 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, 151234 + ... + 161860.

It is an arithmetic number, because the mean of its divisors is an integer number (213644056).

Almost surely, 2^1663624969 is an apocalyptic number.

It is an amenable number.

1663624969 is a deficient number, since it is larger than the sum of its proper divisors (45527479).

1663624969 is a wasteful number, since it uses less digits than its factorization.

1663624969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14895.

The product of its digits is 2519424, while the sum is 52.

The square root of 1663624969 is about 40787.5589978121. The cubic root of 1663624969 is about 1184.9093960055.

The spelling of 1663624969 in words is "one billion, six hundred sixty-three million, six hundred twenty-four thousand, nine hundred sixty-nine".