6616020657 has 4 divisors (see below), whose sum is σ = 8821360880. Its totient is φ = 4410680436.

The previous prime is 6616020643. The next prime is 6616020709. The reversal of 6616020657 is 7560206166.

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 not a de Polignac number, because 6616020657 - 2⁴ = 6616020641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6616010657) 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, 1102670107 + ... + 1102670112.

It is an arithmetic number, because the mean of its divisors is an integer number (2205340220).

Almost surely, 2^6616020657 is an apocalyptic number.

It is an amenable number.

6616020657 is a deficient number, since it is larger than the sum of its proper divisors (2205340223).

6616020657 is a wasteful number, since it uses less digits than its factorization.

6616020657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205340222.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 6616020657 is about 81338.9246117749. The cubic root of 6616020657 is about 1877.2939657113.

The spelling of 6616020657 in words is "six billion, six hundred sixteen million, twenty thousand, six hundred fifty-seven".