2606742251 has 4 divisors (see below), whose sum is σ = 2606868600. Its totient is φ = 2606615904.

The previous prime is 2606742233. The next prime is 2606742287. The reversal of 2606742251 is 1522476062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1522476062 = 2 ⋅761238031.

It is a cyclic number.

It is not a de Polignac number, because 2606742251 - 2²² = 2602547947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2606742751) 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, 24221 + ... + 76158.

It is an arithmetic number, because the mean of its divisors is an integer number (651717150).

Almost surely, 2^2606742251 is an apocalyptic number.

2606742251 is a deficient number, since it is larger than the sum of its proper divisors (126349).

2606742251 is a wasteful number, since it uses less digits than its factorization.

2606742251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126348.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 2606742251 is about 51056.2655410675. The cubic root of 2606742251 is about 1376.2564385033.

The spelling of 2606742251 in words is "two billion, six hundred six million, seven hundred forty-two thousand, two hundred fifty-one".