6666610437 has 6 divisors (see below), whose sum is σ = 9629548422. Its totient is φ = 4444406952.

The previous prime is 6666610387. The next prime is 6666610453. The reversal of 6666610437 is 7340166666.

It can be written as a sum of positive squares in only one way, i.e., 6096642561 + 569967876 = 78081^2 + 23874^2 .

It is not a de Polignac number, because 6666610437 - 2²² = 6662416133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6666610392 and 6666610401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666610487) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370367238 + ... + 370367255.

It is an arithmetic number, because the mean of its divisors is an integer number (1604924737).

Almost surely, 2^6666610437 is an apocalyptic number.

It is an amenable number.

6666610437 is a deficient number, since it is larger than the sum of its proper divisors (2962937985).

6666610437 is a wasteful number, since it uses less digits than its factorization.

6666610437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740734499 (or 740734496 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The square root of 6666610437 is about 81649.3137570672. The cubic root of 6666610437 is about 1882.0667663330.

The spelling of 6666610437 in words is "six billion, six hundred sixty-six million, six hundred ten thousand, four hundred thirty-seven".