7650666357257 has 8 divisors (see below), whose sum is σ = 9538493120832. Its totient is φ = 5961558200400.

The previous prime is 7650666357253. The next prime is 7650666357259. The reversal of 7650666357257 is 7527536660567.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7650666357257 - 2² = 7650666357253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7650666357193 and 7650666357202.

It is not an unprimeable number, because it can be changed into a prime (7650666357253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49679651594 + ... + 49679651747.

It is an arithmetic number, because the mean of its divisors is an integer number (1192311640104).

Almost surely, 2^{7650666357257} is an apocalyptic number.

7650666357257 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

7650666357257 is a deficient number, since it is larger than the sum of its proper divisors (1887826763575).

7650666357257 is a wasteful number, since it uses less digits than its factorization.

7650666357257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99359303359.

The product of its (nonzero) digits is 333396000, while the sum is 65.

The spelling of 7650666357257 in words is "seven trillion, six hundred fifty billion, six hundred sixty-six million, three hundred fifty-seven thousand, two hundred fifty-seven".