665676255155570 has 64 divisors (see below), whose sum is σ = 1217014533504000. Its totient is φ = 262113686415360.

The previous prime is 665676255155557. The next prime is 665676255155591. The reversal of 665676255155570 is 75551552676566.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 665676255155494 and 665676255155503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2249921387 + ... + 2250217233.

It is an arithmetic number, because the mean of its divisors is an integer number (19015852086000).

Almost surely, 2^{665676255155570} is an apocalyptic number.

665676255155570 is a deficient number, since it is larger than the sum of its proper divisors (551338278348430).

665676255155570 is a wasteful number, since it uses less digits than its factorization.

665676255155570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304443.

The product of its (nonzero) digits is 1984500000, while the sum is 71.

The spelling of 665676255155570 in words is "six hundred sixty-five trillion, six hundred seventy-six billion, two hundred fifty-five million, one hundred fifty-five thousand, five hundred seventy".