6348151661 has 4 divisors (see below), whose sum is σ = 6348616512. Its totient is φ = 6347686812.

The previous prime is 6348151637. The next prime is 6348151703. The reversal of 6348151661 is 1661518436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6348151661 - 2²⁶ = 6281042797 is a prime.

It is a super-2 number, since 2×6348151661² = 80598059022114117842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6348150661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211301 + ... + 239466.

It is an arithmetic number, because the mean of its divisors is an integer number (1587154128).

Almost surely, 2^6348151661 is an apocalyptic number.

It is an amenable number.

6348151661 is a deficient number, since it is larger than the sum of its proper divisors (464851).

6348151661 is a wasteful number, since it uses less digits than its factorization.

6348151661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464850.

The product of its digits is 103680, while the sum is 41.

The square root of 6348151661 is about 79675.2888981270. The cubic root of 6348151661 is about 1851.6082106302.

The spelling of 6348151661 in words is "six billion, three hundred forty-eight million, one hundred fifty-one thousand, six hundred sixty-one".