6462651661 has 4 divisors (see below), whose sum is σ = 6463831552. Its totient is φ = 6461471772.

The previous prime is 6462651647. The next prime is 6462651703. The reversal of 6462651661 is 1661562646.

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 6462651661 - 2²⁷ = 6328433933 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 (6462651641) 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, 581691 + ... + 592696.

It is an arithmetic number, because the mean of its divisors is an integer number (1615957888).

Almost surely, 2^6462651661 is an apocalyptic number.

It is an amenable number.

6462651661 is a deficient number, since it is larger than the sum of its proper divisors (1179891).

6462651661 is a wasteful number, since it uses less digits than its factorization.

6462651661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179890.

The product of its digits is 311040, while the sum is 43.

The square root of 6462651661 is about 80390.6192350824. The cubic root of 6462651661 is about 1862.6742720945.

The spelling of 6462651661 in words is "six billion, four hundred sixty-two million, six hundred fifty-one thousand, six hundred sixty-one".