661054454613662 has 16 divisors (see below), whose sum is σ = 1023658938777600. Its totient is φ = 319836699000120.

The previous prime is 661054454613613. The next prime is 661054454613677. The reversal of 661054454613662 is 266316454450166.

It is a happy number.

It is a super-2 number, since 2×661054454613662² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471956462 + ... + 473355057.

It is an arithmetic number, because the mean of its divisors is an integer number (63978683673600).

Almost surely, 2^{661054454613662} is an apocalyptic number.

661054454613662 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

661054454613662 is a deficient number, since it is larger than the sum of its proper divisors (362604484163938).

661054454613662 is a wasteful number, since it uses less digits than its factorization.

661054454613662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945322831.

The product of its (nonzero) digits is 74649600, while the sum is 59.

The spelling of 661054454613662 in words is "six hundred sixty-one trillion, fifty-four billion, four hundred fifty-four million, six hundred thirteen thousand, six hundred sixty-two".