56666469421 has 8 divisors (see below), whose sum is σ = 59654376000. Its totient is φ = 53679108960.

The previous prime is 56666469413. The next prime is 56666469469. The reversal of 56666469421 is 12496466665.

56666469421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56666469421 - 2³ = 56666469413 is a prime.

It is a super-2 number, since 2×56666469421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56666460421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85761 + ... + 347401.

It is an arithmetic number, because the mean of its divisors is an integer number (7456797000).

Almost surely, 2^56666469421 is an apocalyptic number.

It is an amenable number.

56666469421 is a deficient number, since it is larger than the sum of its proper divisors (2987906579).

56666469421 is a wasteful number, since it uses less digits than its factorization.

56666469421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273059.

The product of its digits is 11197440, while the sum is 55.

The spelling of 56666469421 in words is "fifty-six billion, six hundred sixty-six million, four hundred sixty-nine thousand, four hundred twenty-one".