661012442 has 8 divisors (see below), whose sum is σ = 1023503232.
Its totient is φ = 319844700.
The previous prime is 661012427. The next prime is 661012463. The reversal of 661012442 is 244210166.
It can be divided in two parts, 6610124 and 42, that added together give a palindrome (6610166).
It is a sphenic number, since it is the product of 3 distinct primes.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330684 + ... + 5330807.
It is an arithmetic number, because the mean of its divisors is an integer number (127937904).
Almost surely, 2661012442 is an apocalyptic number.
661012442 is a gapful number since it is divisible by the number (62) formed by its first and last digit.
661012442 is a deficient number, since it is larger than the sum of its proper divisors (362490790).
661012442 is a wasteful number, since it uses less digits than its factorization.
661012442 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10661524.
The product of its (nonzero) digits is 2304, while the sum is 26.
The square root of 661012442 is about 25710.1622320825.
The cubic root of 661012442 is about 871.1037393963.
The spelling of 661012442 in words is "six hundred sixty-one million, twelve thousand, four hundred forty-two".