1661630036 has 24 divisors (see below), whose sum is σ = 3173929920. Its totient is φ = 754875200.

The previous prime is 1661630029. The next prime is 1661630041. The reversal of 1661630036 is 6300361661.

It is a super-2 number, since 2×1661630036² = 5522028753074722592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1661629984 and 1661630011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80456 + ... + 98976.

It is an arithmetic number, because the mean of its divisors is an integer number (132247080).

Almost surely, 2^1661630036 is an apocalyptic number.

It is an amenable number.

1661630036 is a deficient number, since it is larger than the sum of its proper divisors (1512299884).

1661630036 is a wasteful number, since it uses less digits than its factorization.

1661630036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20575 (or 20573 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 1661630036 is about 40763.0964967089. The cubic root of 1661630036 is about 1184.4355792129.

Adding to 1661630036 its reverse (6300361661), we get a palindrome (7961991697).

The spelling of 1661630036 in words is "one billion, six hundred sixty-one million, six hundred thirty thousand, thirty-six".