6620542 has 4 divisors (see below), whose sum is σ = 9930816. Its totient is φ = 3310270.

The previous prime is 6620519. The next prime is 6620587. The reversal of 6620542 is 2450266.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655134 + ... + 1655137.

It is an arithmetic number, because the mean of its divisors is an integer number (2482704).

Almost surely, 2^6620542 is an apocalyptic number.

6620542 is a deficient number, since it is larger than the sum of its proper divisors (3310274).

6620542 is a wasteful number, since it uses less digits than its factorization.

6620542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3310273.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 6620542 is about 2573.0413910390. The cubic root of 6620542 is about 187.7721511592.

The spelling of 6620542 in words is "six million, six hundred twenty thousand, five hundred forty-two".