661502177342 has 32 divisors (see below), whose sum is σ = 1011561384960. Its totient is φ = 324360432000.

The previous prime is 661502177291. The next prime is 661502177351. The reversal of 661502177342 is 243771205166.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 661502177293 and 661502177302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103892243 + ... + 103898609.

It is an arithmetic number, because the mean of its divisors is an integer number (31611293280).

Almost surely, 2^661502177342 is an apocalyptic number.

661502177342 is a deficient number, since it is larger than the sum of its proper divisors (350059207618).

661502177342 is a wasteful number, since it uses less digits than its factorization.

661502177342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9776.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 661502177342 in words is "six hundred sixty-one billion, five hundred two million, one hundred seventy-seven thousand, three hundred forty-two".