6651973 has 4 divisors (see below), whose sum is σ = 6685600. Its totient is φ = 6618348.

The previous prime is 6651959. The next prime is 6652001. The reversal of 6651973 is 3791566.

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 6651973 - 2⁵ = 6651941 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 (6651923) 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, 16515 + ... + 16912.

It is an arithmetic number, because the mean of its divisors is an integer number (1671400).

Almost surely, 2^6651973 is an apocalyptic number.

It is an amenable number.

6651973 is a deficient number, since it is larger than the sum of its proper divisors (33627).

6651973 is a wasteful number, since it uses less digits than its factorization.

6651973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33626.

The product of its digits is 34020, while the sum is 37.

The square root of 6651973 is about 2579.1419115667. The cubic root of 6651973 is about 188.0688313677.

The spelling of 6651973 in words is "six million, six hundred fifty-one thousand, nine hundred seventy-three".