66820462 has 4 divisors (see below), whose sum is σ = 100230696. Its totient is φ = 33410230.

The previous prime is 66820441. The next prime is 66820513. The reversal of 66820462 is 26402866.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16705114 + ... + 16705117.

It is an arithmetic number, because the mean of its divisors is an integer number (25057674).

Almost surely, 2^66820462 is an apocalyptic number.

66820462 is a deficient number, since it is larger than the sum of its proper divisors (33410234).

66820462 is a wasteful number, since it uses less digits than its factorization.

66820462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33410233.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 66820462 is about 8174.3783861527. The cubic root of 66820462 is about 405.7916983356.

The spelling of 66820462 in words is "sixty-six million, eight hundred twenty thousand, four hundred sixty-two".