6665156351 has 24 divisors (see below), whose sum is σ = 7921442304. Its totient is φ = 5589729600.

The previous prime is 6665156327. The next prime is 6665156353. The reversal of 6665156351 is 1536515666.

It is a happy number.

It is not a de Polignac number, because 6665156351 - 2²² = 6660962047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665156353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 991301 + ... + 998001.

It is an arithmetic number, because the mean of its divisors is an integer number (330060096).

Almost surely, 2^6665156351 is an apocalyptic number.

6665156351 is a deficient number, since it is larger than the sum of its proper divisors (1256285953).

6665156351 is a wasteful number, since it uses less digits than its factorization.

6665156351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7151 (or 7144 counting only the distinct ones).

The product of its digits is 486000, while the sum is 44.

The square root of 6665156351 is about 81640.4088120583. The cubic root of 6665156351 is about 1881.9299208822.

The spelling of 6665156351 in words is "six billion, six hundred sixty-five million, one hundred fifty-six thousand, three hundred fifty-one".