6651451297 has 4 divisors (see below), whose sum is σ = 7042713156. Its totient is φ = 6260189440.

The previous prime is 6651451267. The next prime is 6651451321. The reversal of 6651451297 is 7921541566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2959795216 + 3691656081 = 54404^2 + 60759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6651451297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6651451217) 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, 195630904 + ... + 195630937.

It is an arithmetic number, because the mean of its divisors is an integer number (1760678289).

Almost surely, 2^6651451297 is an apocalyptic number.

It is an amenable number.

6651451297 is a deficient number, since it is larger than the sum of its proper divisors (391261859).

6651451297 is a wasteful number, since it uses less digits than its factorization.

6651451297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391261858.

The product of its digits is 453600, while the sum is 46.

The square root of 6651451297 is about 81556.4301388922. The cubic root of 6651451297 is about 1880.6391459895.

The spelling of 6651451297 in words is "six billion, six hundred fifty-one million, four hundred fifty-one thousand, two hundred ninety-seven".