253087355666 has 4 divisors (see below), whose sum is σ = 379631033502. Its totient is φ = 126543677832.

The previous prime is 253087355629. The next prime is 253087355699. The reversal of 253087355666 is 666553780352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 253030126441 + 57229225 = 503021^2 + 7565^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63271838915 + ... + 63271838918.

Almost surely, 2^253087355666 is an apocalyptic number.

253087355666 is a deficient number, since it is larger than the sum of its proper divisors (126543677836).

253087355666 is a wasteful number, since it uses less digits than its factorization.

253087355666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126543677835.

The product of its (nonzero) digits is 27216000, while the sum is 56.

The spelling of 253087355666 in words is "two hundred fifty-three billion, eighty-seven million, three hundred fifty-five thousand, six hundred sixty-six".