748208615666 has 8 divisors (see below), whose sum is σ = 1149686409564. Its totient is φ = 364979812480.

The previous prime is 748208615663. The next prime is 748208615669. The reversal of 748208615666 is 666516802847.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (748208615663) and next prime (748208615669).

It can be written as a sum of positive squares in 2 ways, for example, as 589509162025 + 158699453641 = 767795^2 + 398371^2 .

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

It is a super-2 number, since 2×748208615666² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (748208615663) 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, 4562247575 + ... + 4562247738.

Almost surely, 2^748208615666 is an apocalyptic number.

748208615666 is a deficient number, since it is larger than the sum of its proper divisors (401477793898).

748208615666 is a wasteful number, since it uses less digits than its factorization.

748208615666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9124495356.

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 748208615666 in words is "seven hundred forty-eight billion, two hundred eight million, six hundred fifteen thousand, six hundred sixty-six".