6650615412 has 72 divisors (see below), whose sum is σ = 19681526592. Its totient is φ = 1853827200.

The previous prime is 6650615401. The next prime is 6650615423. The reversal of 6650615412 is 2145160566.

6650615412 is a `hidden beast` number, since 6 + 6 + 50 + 61 + 541 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (6650615401) and next prime (6650615423).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311514 + ... + 332177.

It is an arithmetic number, because the mean of its divisors is an integer number (273354536).

Almost surely, 2^6650615412 is an apocalyptic number.

It is an amenable number.

6650615412 is an abundant number, since it is smaller than the sum of its proper divisors (13030911180).

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

6650615412 is a wasteful number, since it uses less digits than its factorization.

6650615412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643749 (or 643744 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 6650615412 is about 81551.3053972774. The cubic root of 6650615412 is about 1880.5603629872.

Adding to 6650615412 its reverse (2145160566), we get a palindrome (8795775978).

It can be divided in two parts, 66506 and 15412, that added together give a palindrome (81918).

The spelling of 6650615412 in words is "six billion, six hundred fifty million, six hundred fifteen thousand, four hundred twelve".