6662149956 has 216 divisors, whose sum is σ = 21444302880. Its totient is φ = 1724486400.

The previous prime is 6662149951. The next prime is 6662149957. The reversal of 6662149956 is 6599412666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

Its product of digits (4199040) is a multiple of the sum of its prime factors (1215).

It is not an unprimeable number, because it can be changed into a prime (6662149951) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10109155 + ... + 10109813.

It is an arithmetic number, because the mean of its divisors is an integer number (99279180).

Almost surely, 2^6662149956 is an apocalyptic number.

6662149956 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6662149956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10722151440).

6662149956 is an abundant number, since it is smaller than the sum of its proper divisors (14782152924).

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

6662149956 is a wasteful number, since it uses less digits than its factorization.

6662149956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1203 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 6662149956 is about 81621.9943152579. The cubic root of 6662149956 is about 1881.6469229901.

The spelling of 6662149956 in words is "six billion, six hundred sixty-two million, one hundred forty-nine thousand, nine hundred fifty-six".