666616113425250 has 48 divisors (see below), whose sum is σ = 1802529970707960. Its totient is φ = 177764296912800.

The previous prime is 666616113425179. The next prime is 666616113425321. The reversal of 666616113425250 is 52524311616666.

It is an interprime number because it is at equal distance from previous prime (666616113425179) and next prime (666616113425321).

It can be written as a sum of positive squares in 4 ways, for example, as 341171302297329 + 325444811127921 = 18470823^2 + 18040089^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148136911845 + ... + 148136916344.

Almost surely, 2^{666616113425250} is an apocalyptic number.

666616113425250 is an abundant number, since it is smaller than the sum of its proper divisors (1135913857282710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666616113425250 is a wasteful number, since it uses less digits than its factorization.

666616113425250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296273828212 (or 296273828199 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 666616113425250 in words is "six hundred sixty-six trillion, six hundred sixteen billion, one hundred thirteen million, four hundred twenty-five thousand, two hundred fifty".