866801542 has 32 divisors (see below), whose sum is σ = 1411281792. Its totient is φ = 397722624.

The previous prime is 866801501. The next prime is 866801557. The reversal of 866801542 is 245108668.

It is a junction number, because it is equal to n+sod(n) for n = 866801495 and 866801504.

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, 499308 + ... + 501040.

It is an arithmetic number, because the mean of its divisors is an integer number (44102556).

Almost surely, 2^866801542 is an apocalyptic number.

866801542 is a deficient number, since it is larger than the sum of its proper divisors (544480250).

866801542 is a wasteful number, since it uses less digits than its factorization.

866801542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 866801542 is about 29441.4935422780. The cubic root of 866801542 is about 953.4689581879.

The spelling of 866801542 in words is "eight hundred sixty-six million, eight hundred one thousand, five hundred forty-two".