6611625401 has 4 divisors (see below), whose sum is σ = 6630355572. Its totient is φ = 6592895232.

The previous prime is 6611625389. The next prime is 6611625451. The reversal of 6611625401 is 1045261166.

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 1164447376 + 5447178025 = 34124^2 + 73805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6611625401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6611625451) 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, 9364556 + ... + 9365261.

It is an arithmetic number, because the mean of its divisors is an integer number (1657588893).

Almost surely, 2^6611625401 is an apocalyptic number.

It is an amenable number.

6611625401 is a deficient number, since it is larger than the sum of its proper divisors (18730171).

6611625401 is a wasteful number, since it uses less digits than its factorization.

6611625401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18730170.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 6611625401 is about 81311.9019639806. The cubic root of 6611625401 is about 1876.8781560751.

Adding to 6611625401 its reverse (1045261166), we get a palindrome (7656886567).

The spelling of 6611625401 in words is "six billion, six hundred eleven million, six hundred twenty-five thousand, four hundred one".