6665151240 has 384 divisors, whose sum is σ = 25205281920. Its totient is φ = 1509580800.

The previous prime is 6665151239. The next prime is 6665151271. The reversal of 6665151240 is 421515666.

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

It is a junction number, because it is equal to n+sod(n) for n = 6665151195 and 6665151204.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12184647 + ... + 12185193.

It is an arithmetic number, because the mean of its divisors is an integer number (65638755).

Almost surely, 2^6665151240 is an apocalyptic number.

6665151240 is a gapful number since it is divisible by the number (60) 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 6665151240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12602640960).

6665151240 is an abundant number, since it is smaller than the sum of its proper divisors (18540130680).

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

6665151240 is a wasteful number, since it uses less digits than its factorization.

6665151240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 766 counting only the distinct ones).

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

The square root of 6665151240 is about 81640.3775101512. The cubic root of 6665151240 is about 1881.9294398459.

The spelling of 6665151240 in words is "six billion, six hundred sixty-five million, one hundred fifty-one thousand, two hundred forty".