66461535154204 has 6 divisors (see below), whose sum is σ = 116307686519864. Its totient is φ = 33230767577100.

The previous prime is 66461535154199. The next prime is 66461535154277. The reversal of 66461535154204 is 40245153516466.

It is a super-2 number, since 2×66461535154204² (a number of 28 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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8307691894272 + ... + 8307691894279.

Almost surely, 2^{66461535154204} is an apocalyptic number.

It is an amenable number.

66461535154204 is a deficient number, since it is larger than the sum of its proper divisors (49846151365660).

66461535154204 is a wasteful number, since it uses less digits than its factorization.

66461535154204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16615383788555 (or 16615383788553 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 52.

The spelling of 66461535154204 in words is "sixty-six trillion, four hundred sixty-one billion, five hundred thirty-five million, one hundred fifty-four thousand, two hundred four".