66526742 has 4 divisors (see below), whose sum is σ = 99790116. Its totient is φ = 33263370.

The previous prime is 66526727. The next prime is 66526751. The reversal of 66526742 is 24762566.

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

It is a super-2 number, since 2×66526742² = 8851614802269128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66526696 and 66526705.

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, 16631684 + ... + 16631687.

It is an arithmetic number, because the mean of its divisors is an integer number (24947529).

Almost surely, 2^66526742 is an apocalyptic number.

66526742 is a deficient number, since it is larger than the sum of its proper divisors (33263374).

66526742 is a wasteful number, since it uses less digits than its factorization.

66526742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33263373.

The product of its digits is 120960, while the sum is 38.

The square root of 66526742 is about 8156.3927075638. The cubic root of 66526742 is about 405.1962509727.

The spelling of 66526742 in words is "sixty-six million, five hundred twenty-six thousand, seven hundred forty-two".